i am at 4.1 and eagerly awaiting the jailbreak to be released. i had my old 3G jailbroken, but haven't done it with my iPhone 4 . . . yet. i've only had it a week and knew 4.1 was coming. i still have the unlimited data plan and i'd like to get internet tethering on my iPhone (without paying AT&T since i already get unlimited data).