Today, I tried to hack an iPod touch with QuickPwn tool released by iPhone-Dev team. QuickPwn was much more past since it does not build a custom hacked firmware. The hacking took only 5 minutes. One thing I didn't want is that the QuickPwn changes the boot logo from the apple's to their pineapple.
After hacking iPod touch, I installed Quake4iPhone from Cydia for testing and it works well.