The iPhone Dev-Team has released yellowsn0w v0.9.6 which should fix 'EVEN MORE' problems that users may have experienced when unlocking their iPhone 3G. This new version is said to eliminate the need for switching AirPlane mode on and off to find service.
The iPhone Dev-Team is also using http://report.yellowsn0w.com/ to track the success rate of the iPhone unlock. You can submit your own unlock experience at http://report.yellowsn0w.com/submit.php to help them update and improve the yellowsn0w application for other users.
If you would like to learn how to unlock your iPhone you can use the tutorial located here
The iPhone Dev-Team is also using http://report.yellowsn0w.com/ to track the success rate of the iPhone unlock. You can submit your own unlock experience at http://report.yellowsn0w.com/submit.php to help them update and improve the yellowsn0w application for other users.
If you would like to learn how to unlock your iPhone you can use the tutorial located here