And Finally ...
Dev-Team Blog
Ultrasn0w for iPhone 3G is ready!
Ensure you have upgraded to iPhone OS 3.0 and jailbroken your 3G with PwnageTool or redsn0w
Please add the repo repo666.ultrasn0w.com to cydia or icy
Search for ‘ultrasn0w’ in cydia or icy and install ultrasn0w
Reboot your iPhone 3G
T-Mobile USA users should disable 3G before using ultrasn0w
Enjoy
Dev-Team Blog