I currently have an iPod Touch running 4.0. It was previously jailbroken on 3.1.2 (via blackra1n) and 3.1.3 (via Spirit). I have both 3.1.2 and 3.1.3 SHSHs backed up with Cydia. I am unable to jailbreak now (all of you 3rd gens should feel my pain) and was wondering: Should I downgrade and jailbreak? OR Should I wait for a 4.0 jailbreaking solution? If downgrade, can someone point me to a guide which explains how to downgrade from 4.0 to 3.1.2/3? I have a Mac. Thanks!