So I sent my 3Gs into apple for two reasons 1. I was having sim card issues with the phone and 2. I was getting lots of dust behind the glass. I got the email yesterday that my product was received by Apple. I had my 3Gs jailbroken on 4.0.1 with SHSH's backed up for 3.1.3, 4.0 and 4.0.1. I was hoping Apple would just replace the screen and fix the sim issue so that I could downgrade back to 4.0.1 and rejailbreak. Well, just got the email from Apple and they just replaced the phone rather than fix it. So now I am back to waiting for a new jailbreak. BUMMER!