Yeah no kidding. I was trying to downgrade to 2.2.1 and jailbreak so I can get access and then restore to 3.0 and hoped that work, but I can't even get to 2.2.1, after it unpackages the .ipsw I get a 1600 error.
Edit: Tried it on my MacBook, Windows 7 x64 on my MacBook, Windows 7 x64 on my PC, and now Windows XP on another PC, seems like I'm getting some progress, I'll update when it's finished.