Yeah, and why wasn't I smart enough to read on to this post (^^) before I tried it?

*smacks forehead*
I was running a jailbroken / unlocked 1.1.4, then upgraded to 2.1 through iTunes 8. (Yeah

).
What's more I can't access the screen with the 'restore' and 'update' buttons, as iTunes is showing me a locked screen with the sim card message, hence I couldn't even try installing a different firmware. (Got a 1st gen iPhone unlocked off e-bay)
I think I've rendered the iphone completely unusable. I'd use it as a paperweight, but I have no papers to put it on.
Any ideas, or is the phone permanently unusable now?
Welcome to the club?