Hopefully I can help...
1. Save ALL of the content you have in Itunes, on an external hard drive. Music, videos, photos, everything. You can drag and drop from Itunes itself to the hard drive.
2. Wipe the hard drive back to it's factory state. (Consult your manufacturer guide or support to do this.)
3. Install Itunes 8 (EIGHT), any version you can find. Google it. Download.com (Cnet) has a link to one.
4. Once you have that installed, drag and drop your files from the external hard drive to the Itunes menu.
5. Plug back in your Ipod. You MAY get an error message or Itunes will lock up. I'm going to guess that this is because Itunes 9 pretty much screwed up the Classic firmware. Don't quote me on that though.
This whole step is circumstantial, but if you wrestle enough with the format function and restore button with your Ipod, you can HOPEFULLY get it functional again. I had to use a relative's laptop to fix my Classic, but that was after I was fighting with the format and restore for a few minutes.
Caution: DO NOT UPDATE TO ITUNES 9. DO NOT UPDATE ITUNES *_AT ALL_* unless Apple EXPRESSLY informs us that the new update will either fix our Classics or not screw them up.
The whole hard-drive-wiping may seem a little extreme, but if you love your music as much as I love mine, then it's a small price to pay. I can't guarantee that this whole process will 100% fix your Ipod, but it's more help than you're going to get from Apple.
Good luck people.
Message was edited by: BK-Sleeper