Just came across a really nifty donationware program called Clutter.
To copy from the Clutter website,
Clutter is a small Mac OS X application that lets you put music CDs on your desktop. You can drag them anywhere — they’re really windows. Line them up neatly or put them in piles, it’s your choice. Each one looks like the real CD’s cover, and double-clicking it tells iTunes to play that CD.
Think of Clutter as an alternate user interface to your music collection. When deciding what to play next, instead of searching through a huge alphabetical list, let your eye roam over the covers of your favorite CDs and those you’ve been listening to recently.
There’s a main window that shows the CD you’re now playing — the cover picture is looked up automatically from Amazon or from iTunes 4, or you can paste in your own. (You can also export pictures to iTunes 4.) To keep a CD around for easy access, just drag the picture out of the window onto your desktop. Then double-click it whenever you want to play it.
It’s cute, elegant, simple, and functional for finding that CD art rather than going to the trouble of scanning your covers.