I just noticed that the songs on the website "Richard G's Ukulele Songbook" can be listed by key - handy if you're looking for a song for one of pabrizzer's bi-weekly contests. Could also I guess be useful for thinking about songs that might go together for a medley for this Season (although songs don't have to be in the same key to work nicely in a medley).
http://wp.scorpexuke.com/songs/
http://wp.scorpexuke.com/songs/