The one thing that my MP3 collection is lacking is my vinyl collection. Some I've found CDs for, so those have been MP3'd. However, some of my albums don't exist as CDs, so I'm going to need to hook my stereo up and go that route. Scanning in the album covers will be the hardest thing, since albums are bigger than my scanner area. Hopefully I'll find someone online who's already successfully done it. :-)
Anyhoo, that's all for another day. For now, I'm pleased that I've done as much as I've gotten so far.