If the newly released iPhone 3G unlock isn’t working out for you, the iPhone Dev Team has released a new version that might put an end to all your unlocking woes.
Yellowsnow 0.9.4 Beta is out now which addresses some complaints that have trickled in upon the release of the group's first iPhone 3G unlock. By default, it’s now always in quick mode unless you enable the –l option for long mode. PIN support still isn’t quite there yet, but given how fast they were able to come out with this new iteration of Yellowsnow, I wouldn’t be surprised at all if PIN support would become available within the month.
If this new iPhone 3G unlock still doesn’t work on your end, send your complaints to the iPhone Dev Team here so that they can include an appropriate fix in their next release.