I've got a Treo 270 on Tmobile. I configured the APN and all that to try and get the free WAP to work, but it was only with limited success. The thing kept going down on me. I also couldn't get a POP3 program to work to check email, or any IM programs to work.

I called TMO and signed up for their $5/mo tones. My POP3 now works SOMETIMES, but the rest of the time the service times out. It's really annoying. I'm using the wap.voicestream.com as my APN.

AvantGo works well though.