iphone os 3.0.1 firmware
Dev Team Advises Users Not To Upgrade To iPhone OS 3.1 Beta Firmware
The reasons as to why Dev Team decided to delay the release of JailBreak for iPhone 3GS until iPhone OS 3.0.1 firmware is out it will only benefit only few people and Apple to be expected to to release iPhone OS 3.0.1 firmware soon to block ultrasn0w and the iboot exploit.