DuskFade
I put the disc in, it chugs and chugs along for about 10 seconds, and then spits it out. Anyone have any ideas?
This can happen if the lens on the laser is out of focus or dirty. It can also happen when the laser is beginning to fail (they really don't last as long as you'd think).
If you've got AppleCare, send it to them. They'll replace the drive, good as new.
You could try cleaning it with a drive cleaning disk, but I really don't know what that would do to a slot-loader. They are pretty rough on drives.