Just updated your *hacked* iPhone to the latest firmware 2.2.1? Your internet ($5 T-Zones or else) is gone and it looks like it’s gone for good as the lovely people over in Cupertino disabled the APN settings (Settings -> General -> Network -> Cellular Data Network is gone). Unfortunately there is not very much you can do without these, and Cydia doesn’t provide for a hack either.
Took me about 3 hours to find a solution: just find WiFi internet access, open Safari and point your browser to unlockit.co.nz. Just follow the menu and choose settings for T-Mobile USA but change the WAP URL as it has changed to epc.tmobile.com (username and password need to be kept blank). The site will generate a file, which you want to download and install. Restart your iPhone and you’re all set. No need to SSH or FTP files to your phone.
Hope this saves you some poking around…
UPDATE: I used Pwnage to update my iPhone 2G (1st Gen) to software 3.0 last week. Did another 2G last weekend, both times it all went well. The Settings “General -> Network -> Cellular Data Network” are back and you can just enter
(leave username & password blank) and it all works perfectly. Full speed EDGE, subjectively a little faster than before, maybe because the rendering engine has been updated.