Woodshed has posted the tab and chords for Jason Mraz's I'm Yours. It seems that all the kids are playing it on their ukes these days. I can vouch for the fact that it's the one ditty I can play when my girls' friends are around that won't get me banished to the back bedroom.
Al's version is presented in a more uke-friendly key than the original. I play it in the original key, and think it makes it easier to dampen the strings to get the rhythmic sound, but this verison has chords that pretty much anyone can learn in a few minutes, and so who knows, maybe might insprire yet another whippersnapper to pick up the uke.
Al has also graciously included diagrams for the Twiddly Bits so you can play the intro like a pro. Link