it's not Ultrasn0w update, but for u who rushing to unlock their iPhone on 4.3.1 (and can't wait till MuscleNerd update Ultrasn0w) maybe this one can help u...
Quote:
"basically it FIX the ultrasn0w issue with ASLR on iOS 4.3.1 that prevent Ultrasn0w to work."
it's compatible with 3Gs and iP4 that running Unlockable Baseband (04.26.08 - 05.11.07 - 05.12.01 - 05.13.04 - 06.15.00 - 01.59)
BEWARE!! THIS IS NOT NEW UNLOCK!!
You can Download It by adding Cydia.pushfix.info to your sources.