I have the $5.99 T-Zone data plan and they have set my account so I can access any site. In connecting up my N800 to my Slvr, I had no success with internet2.voicestream.com. So I switched to wap.voicestream.com and used proxy 216.155.165.50. It now works, but it is too slow to use with Maemo Mapper (I get timeouts). My Slvr notes that GPRS is connected when I am connected with the N800.

I am happy just to be connected for $5.99/mo, but of course I want more! Any hints on how to get the best performance on the T-Zone plan?