For those of you in the US, T-Mobile's prepaid includes all you can eat GPRS on port 80 and a few others. Highly reccomended. It won't last forever, but it's nice at the moment.

Even if they do find a way to close this loophole, their data rates are much more reasonable, with $20 a month for unlimited. The reason limited data access works right now is that TMobile wants all their customers to be able to view their WAP site to download ringtones, and to also be able to e-mail pictures from camraphones. Thus those ports are open on the data network, including the SSL variants of IMAP and POP.