I've tried several of the guides here on jailbreaking my iPhone 3gs running 4.0.2 but I've been unsuccessful. I heard that limera1n would work with 4.0.2, but when I downloaded it and ran it, no app showed up.
Would I be better off updating to 4.1 and then jailbreaking? If so, how do I go about downloading to 4.1 and not having to update to 4.2 then downgrade?