I did try networking over Bluetooth (using a Bluetooth dongle and bridging on my Win XP PC) with some success. The screen is definitely big enough to read some web pages comfortably and some sites such as Hotmail and Yahoo have special mobile pages, but Bluetooth is fairly slow and at least in my configuration the connection seemed to drop out regularly.

My experience with Bluetooth makes me want a WiFi card all the more, but I'm not about to pay more than $100 for one until at least one person has tried it and reports success.