IEEE 802.11b PDAs

The Bottom Line: The Sony Mylo Communicator 2 is a huge improvement over its predecessor, but the Wi-Fi handheld will have a hard time competing with the similarly priced and better featured iPhones, Sidekicks, and Helio Oceans of the cellular world.

Specs: 1 GB, IEEE 802.11b, IEEE 802.11g, 5.2 in x 0.8 in x 2.6 in, Stylus, Keyboard

The Bottom Line: The Sony Mylo Communicator 2 is a huge improvement over its predecessor, but the Wi-Fi handheld will have a hard time competing with the similarly priced and better featured iPhones, Sidekicks, and Helio Oceans of the cellular world.

Specs: 1 GB, IEEE 802.11b, IEEE 802.11g, 5.2 in x 0.8 in x 2.6 in, Stylus, Keyboard

The Bottom Line: Though not necessarily worth the price for an upgrade, the Nokia N810 Internet Tablet brings some nice additions to the mobile Web browsing device, including a full QWERTY keyboard and integrated GPS.

Specs: Linux, 128 MB, Texas Instruments 400 MHzOMAP2420, IEEE 802.11b, IEEE 802.11g, Bluetooth 2.0 EDR, 5 in x 0.6 in x 2.8 in, Stylus, Keyboard, Touch-screen

The Bottom Line: On paper, the Mio DigiWalker P550 looks to be an attractive gadget for the mobile professional, combining the capabilities of a PDA and GPS into one device. However, its poor battery life and subpar navigation skills tell a different story.

Specs: Microsoft Windows Mobile 5.0, 64 MB, Samsung 400 MHzS3C2440, IEEE 802.11b, IEEE 802.11g, Bluetooth 2.0, 2.8 in x 0.7 in x 4.5 in, Stylus, Touch-screen, 4-way joystick

The Bottom Line: Though it won't appeal to the masses quite yet, the Nokia N800 Internet Tablet is a nice, portable device for on-the-go Web browsing, and it has some worthy upgrades.

Specs: Internet Tablet OS 2007, 128 MB, IEEE 802.11b, IEEE 802.11g, Bluetooth 2.0, 5.7 in x 0.5 in x 3 in, Stylus, Touch-screen

The Bottom Line: The HP iPaq rx5900 Travel Companion delivers a sleek all-in-one navigation, productivity, and entertainment device to mobile professionals; we just wish it had better battery life.

Specs: Microsoft Windows Mobile 5.0 Premium Edition, 64 MB, Samsung 400 MHzS3C2442, IEEE 802.11b, IEEE 802.11g, Bluetooth 2.0 EDR, 3 in x 0.6 in x 4.7 in, Stylus, Touch-screen

The Bottom Line: The Sony Mylo offers nice messaging and multimedia features for students, but we're not sure that's enough.

Specs: 1 GB, IEEE 802.11b, 4.8 in x 0.9 in x 2.5 in, Keyboard

The Bottom Line: Maps and personal data go hand in hand with the Pharos Traveler GPS 525, a PDA that effectively combines organization with navigation to not only find where you are but also point you where to go.

Specs: Microsoft Windows Mobile 5.0, 64 MB, 300 MHz, Bluetooth, IEEE 802.11b, 2.3 in x 0.7 in x 4.3 in

The Bottom Line: The Asus MyPal A636 is a PDA with a built-in GPS receiver that puts maps and directions on an equal footing with appointments and e-mail. While it delivers accurate directions and long battery life, it's a bit sluggish.

Specs: Microsoft Windows Mobile 5.0, 64 MB, Intel 416 MHzXScale PXA272, IrDA, Bluetooth, IEEE 802.11b, 2.9 in x 0.7 in x 4.8 in, Stylus, Touch-screen, 5-way navigation button

Editors' Take: The I-mate PDA-N is packed with features, and you'll pay for every one of them.

Specs: Microsoft Windows Mobile 5.0, 64 MB, Samsung 300 MHz, IrDA, Bluetooth, IEEE 802.11b, 2.3 in x 0.7 in x 4.3 in, Stylus, Touch-screen, 5-way navigation button