Can you export/capture the contents of a Genius Mix? In iTunes, I know you can save a Genius Playlist, and you can see a few songs ahead in a Genius Mix by looking at Up Next, but is there any way to actually save a Genius-Mix-generated playlist?

Or is it that the Genius Mix playlist doesn't even exist (more than the few songs in Up Next)?  Like, is iTunes just popping another random song (of the appropriate category) on the end of the list?
You can do so with this AppleScript.