Jailbreak firmware 3.0 (iPhone 2g, iPhone3g, iPod Touch1g, iPod Touch2g) has been released (there is a triple cheer here!) For Mac (intel-Mac only) and Windows.
UPD: 4 minutes ago, a utility for unlocking 3g appeared in the sidia (instructions below).
redsn0w - program in the spirit of QuickPwn. Before launching the program, flashing the iPhone / iPod to a new firmware in iTunes. Run redsn0w and follow the instructions. Everything is very simple)
For 3g: After flashing and using the redsn0w utility for unlocking the phone, add repo666.ultrasn0w.com to the sidia repositories and look for ultrasn0w.
Dear hacker user, here are full instructions, but be careful - English