Im not sure if anyone here has jailbroken their iphone 3g with 3.0 yet, but anyway i downloaded redsn0w and when i open it says to browse for my current Firmware version. now i have the 3.0, but i thought i would have to have a custom 3.0 firmware for this. Idk, im going to try with the standard 3.0 Firmware and see if i can get cydia, which i doubt will work. but if anyone knows for sure then any help would be greatly appreciated. Ill post any conclusions i get to.