I've heard the tungsten and many other PDA's can sync directly to your phone so you can access the internet and update your contact lists using Bluetooth. Does anyone have any insight into what PDA to buy?
A few folks I know have been using and are very happy with the BlackBerry [blackberry.com]. From what I understand, when used in conjunction with MS Exchange, you are able to keep your email,contacts and calendar insync at all times.
If you aren't one fortunate enough to have an Exchange server, a HP 4155 is great! It has bluetooth and WLAN built right in. I love mine. It also has the old fashioned IR port so you can sync with laptops that don't have WLAN or Bluetooth.
Keep in mind, the range of bluetooth is only 33ft.