The combination of the PDA and the cell phone has been a long time coming.  Finally both at a great price!!!
I have attached only a few for your chance to take a look at the future of Cellular phones.

I am so surprised that the phones are so small and how much information they can provide.  Black berry is a new player on the market and have three to choose from.
BlackBerry 7210 sports with great high-resolution, full-color screen the BlackBerry 6210 and the 6710 are not color.  The Siemens phone is very close to a pocket computer as you are going to get. The Palm Tungsten W is the largest unit.  The problem is going to what best soot's your needs and what one has the best features for your liking.

The high-end BlackBerry 7210 sports a glorious high-resolution, full-color screen, which you can use for viewing pictures. This new model is based on the Java platform, making it compatible with more applications. As with all Blackberry models, you can talk, send text messages, e-mail using your existing accounts and browse the Web from wherever you are. Keep your calendar and contacts up to date, and then synch your data back at the office. Inside and out, the Blackberry was designed for security, simplicity and ease.

With the Palm Tungsten W, you get access to a wireless phone, e-mail, data, and the Web. Tap into up to 8 existing e-mail accounts, keep in touch using text messaging, or attach the hands-free headset and you're ready to multitask; talk on the phone at the same time you're checking your calendar. Best of all, the Palm handles Word, Excel and PowerPoint files, so you can view familiar documents on the Palm's ultra-sharp

The Siemens SX56 Pocket PC offers you more choices for communicating and accessing your personal and corporate information so you can stay in touch and up to date.