Now for some of my own picks:
Another cover crooner in the style of your Richard Cheeses and the like, but Bennett plays up the Rat Packiness of his namesakes a bit more faithfully than the others while singing a more diverse selection. For instance, I never suspected I'd hear a swinger version of Nick Cave's "Red Right Hand."
Italian music blog MusicBoom put together a downloadable tribute to the Beatles a while back that features unique combination of songs by (Italian, of course) indie, lo-fi and electronic acts. It's no longer available at the site, but here's a taste.
This is my favorite track from Swing-a-Billy Chartbusters from Germany's swing label, Frankie Boy Records.
The next two tracks come from one of my favorite tribute albums of the past year or so, Stop Me if you think You've Heard this One Before. Of course, I'm not sure that's a rousing review, since most tribute albums really suck. But the way I see it, any tribute album that can get me to listen to a Mazzy Star song without retching has some merit.