Name Meaning: The BlackBerry® Pearl™ 8100™ smartphone moves the innovative BlackBerry® functionality to a new level! The BlackBerry Pearl will be the first Blackberry to offer an integrated 1.3 Megapixel camera along with the other usual goodies such as voice activated dialing, Bluetooth® support, speakerphone, IM support including including Yahoo!® Messenger and Google Talk® and a media player for listening to MP3s and watching videos, all wrapped up into one compact, integrated device.

Name Meaning: The BlackBerry® Pearl™ 8100™ smartphone moves the innovative BlackBerry® functionality to a new level! The BlackBerry Pearl will be the first Blackberry to offer an integrated 1.3 Megapixel camera along with the other usual goodies such as voice activated dialing, Bluetooth® support, speakerphone, IM support including including Yahoo!® Messenger and Google Talk® and a media player for listening to MP3s and watching videos, all wrapped up into one compact, integrated device.

Name Meaning: The BlackBerry Curve is the smallest, lightest BlackBerry ever with a QWERTY keyboard. It features a liquid silver finish with clean lines, curved edges, and easy-to-use trackball navigation. The sleek design balances both personal and work needs with the perfect blend of performance and usability. The Curve is the first BlackBerry to support AT&T Mobile Music, an enhanced media player, and stereo Bluetooth® headset capabilities. Snap crisp photos on the 2 MP camera with 5x zoom and flash. Need more storage? It has a microSD™ expandable memory slot to store music, videos and more. The Curve comes with BlackBerry's first email spellchecker, TeleNav Maps, and the AT&T Mall to shop for ringtones and downloads. Go global, the Curve has everything you ever needed or wanted in a BlackBerry.

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BlackBerry

BlackBerry® 8820 is a "dual-mode" handset that acts as a regular cellphone but also allows users to connect to the Internet through a wi-fi connection at home or at "hotspots." When connected to the Internet, users can make phone calls, send e-mails or browse the Web. It is full of convenient features such as voice dialing, speakerphone, and Bluetooth. The BlackBerry 8820 is a quad-band GSM/GPRS and EDGE-enabled smartphone that provides global wireless voice and data capabilities with best-in-class performance. This device is an extraordinary business phone for people who really care about mobile communications and productivity.

The communication between the cell phone and a cell phone directory can be established via web browser.  Also the screen size is fair, so attempting to lookup cell phone numbers is easy.

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BlackBerry 7130e (Sprint)

The first EV-DO capable BlackBerry device in the country! This CDMA BlackBerry combines EV-DO high-speed data with the compact 7100-series design. Key features include Bluetooth, SureType text keypad, a large color display, speakerphone, and laptop data via USB

This cell phone retains a high-speed data connection.  I've not actually tested this phone on cell phone directories, but based on the specs this cell phone should connect to a mobile cell phone directory online very well.

Name Meaning: The BlackBerry® Pearl™ 8100™ smartphone moves the innovative BlackBerry® functionality to a new level! The BlackBerry Pearl will be the first Blackberry to offer an integrated 1.3 Megapixel camera along with the other usual goodies such as voice activated dialing, Bluetooth® support, speakerphone, IM support including including Yahoo!® Messenger and Google Talk® and a media player for listening to MP3s and watching videos, all wrapped up into one compact, integrated device. You get rock-solid voice performance, email, web browsing and BlackBerry Maps™ in a thin, stylish, lightweight handheld with a SureType QWERTY keyboard layout.

Name Meaning: The BlackBerry 8703e offers a high resoultion display with Ev-DO technology. This Wireless Handheld™ puts leading BlackBerry® functionality such as email, phone, browser, instant messaging and organizer into one compact, integrated device. The 8703e allows users to connect their laptop or desktop computer to the Internet, using the device as a tethered modem – so they don’t need to carry a wireless PC card.

Name Meaning: The BlackBerry 8830 wireless handheld serves as a phone, browser, pager, and PDA, enabling e-mail to be sent to and received from any POP3 e-mail account. Wireless synchronization with E-mail, powerful organizer features and a thumb-operated trackwheel make the Blackberry 8830 is a must for professionals on the go.

Name Meaning: E-mail just got personal. Exclusively from T-Mobile, the new BlackBerry® Pearl™ 8100™ makes staying connected via e-mail to friends, family and life as easy as calling. You can combine up to 10 personal and work addresses and have them automatically delivered – right to the palm of your hand. The BlackBerry Pearl is a full-featured quad-band world phone, with 1.3 megapixel camera, real Web browser, Bluetooth® 2.0 connectivity, and a media player with extra storage, so you can do it all and keep in touch virtually anytime, anywhere.

Name Meaning: The BlackBerry® Pearl™ 8100™ smartphone moves the innovative BlackBerry® functionality to a new level! The BlackBerry Pearl will be the first Blackberry to offer an integrated 1.3 Megapixel camera along with the other usual goodies such as voice activated dialing, Bluetooth® support, speakerphone, IM support including including Yahoo!® Messenger and Google Talk® and a media player for listening to MP3s and watching videos, all wrapped up into one compact, integrated device. You get rock-solid voice performance, email, web browsing and BlackBerry Maps™ in a thin, stylish, lightweight handheld with a SureType QWERTY keyboard layout.

Name Meaning: The BlackBerry® Pearl™ 8100™ smartphone moves the innovative BlackBerry® functionality to a new level! The BlackBerry Pearl will be the first Blackberry to offer an integrated 1.3 Megapixel camera along with the other usual goodies such as voice activated dialing, Bluetooth® support, speakerphone, IM support including including Yahoo!® Messenger and Google Talk® and a media player for listening to MP3s and watching videos, all wrapped up into one compact, integrated device. You get rock-solid voice performance, email, web browsing and BlackBerry Maps™ in a thin, stylish, lightweight handheld with a SureType QWERTY keyboard layout.

Name Meaning: The BlackBerry® Pearl™ 8100™ smartphone moves the innovative BlackBerry® functionality to a new level! The BlackBerry Pearl will be the first Blackberry to offer an integrated 1.3 Megapixel camera along with the other usual goodies such as voice activated dialing, Bluetooth® support, speakerphone, IM support including including Yahoo!® Messenger and Google Talk® and a media player for listening to MP3s and watching videos, all wrapped up into one compact, integrated device. You get rock-solid voice performance, email, web browsing and BlackBerry Maps™ in a thin, stylish, lightweight handheld with a SureType QWERTY keyboard layout.

Name Meaning: The BlackBerry Curve is the smallest, lightest BlackBerry ever with a QWERTY keyboard. It features a liquid silver finish with clean lines, curved edges, and easy-to-use trackball navigation. The sleek design balances both personal and work needs with the perfect blend of performance and usability. The Curve is the first BlackBerry to support an enhanced media player, and stereo Bluetooth® headset capabilities. Snap crisp photos on the 2 MP camera with 5x zoom and flash. Need more storage? It has a microSD™ expandable memory slot to store music, videos and more. The Curve comes with BlackBerry's first email spellchecker and TeleNav Maps. Go global, the Curve has everything you ever needed or wanted in a BlackBerry.

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BlackBerry 7100i (Nextel)

The Nextel BlackBerry 7100i makes it easy for one to research virtually anything they want while on the go! This BlackBerry brings the 7100-series design and unique SureType keyboard to iDEN networks. The 7100i combines Bluetooth-technology, push email, PTT, speakerphone, GPS, and Java.

Since it is tightly integrated with nextel, only nextel can establish cell phone numbers.

The nextel works great for short conversations but doesn't really speciaze in web browser controls so an online cell phone directory might not be a good fit.