I slowly followed the guide, and still got this error:
I just started getting that logo for the app in itunes now too so I thought it would work. This has to be my computer now, I'm running Vista Home Premium 32 bit. Is anyone else having this problem with this OS?
I'll be trying for sure on a mac today, and I'll let you guys know.
EDIT: I'm using a 32GB 3GS also.
EDIT 2: I messed up w/ my UDID. No problems at all now.