The way I'd restore the library from a back up is get the source files back in the native folder and the iTunes library wouldn't even know they left. If you restore to a different location, you just go to file, add folder to library and it imports them all back in.
Sharing libraries between two or more iPods? I'm not sure, I only have one. I do know that you can't sync a single ipod to more than one Itunes library without losing what you have on the old sync. Obviously a piracy limiting tactic.
On the other side of the usability spectrum, I have a car stereo that plays MP3 off a USB drive and it's really horrible at file management. It doesn't read ID3 tags at all but rather just deals in filenames and folders. I makes me appreciate the iPod interface that much more.
Sharing libraries between two or more iPods? I'm not sure, I only have one. I do know that you can't sync a single ipod to more than one Itunes library without losing what you have on the old sync. Obviously a piracy limiting tactic.
On the other side of the usability spectrum, I have a car stereo that plays MP3 off a USB drive and it's really horrible at file management. It doesn't read ID3 tags at all but rather just deals in filenames and folders. I makes me appreciate the iPod interface that much more.