I have AT&T, and decided to go the pwnage route last night. I went back to an Apple stock 1.1.4 and then ran the pwnage utility. I unlocked, neutered, and all that stuff (without upgrading or downgrading the baseband). The only difference I can tell so far in the 2 methods is that my phone never boots up with the inability to find the network. Since running this, my phone gets signal before uCalendar even loads now. Sometimes I would have to reboot my phone several times to get signal. Not anymore!!! 
Very happy with this! I cant wait for custom firmware to start hitting the scene
Very happy with this! I cant wait for custom firmware to start hitting the scene