I have been enjoying the 2006 Coverville Countdown. This is a selection of cover songs which listeners have voted on as their favorites (no, I didn't vote).
My favorites so far?
From Part 1, the Icehouse version of David Bowie's "Heroes" and The CopperBox version of Pink Floyd's "Comfortably Numb" (sort of bluegrass/zydeco).
From Part 2, the Cake version of the Muppets "Mahna Mahna" (progressive rock), the Johnny Cash/Joe Strummer version of Bob Marley's "Redemption Song" (folk), Joey Ramone's version of Louis Armstrong's "What a Wonderful World" (punk) and the Yum! Yum! Orange! version of Bobby McFerrin's "Don't worry Be Happy" (ska).
From Part 3, the Opie Gone Bad version of the Rolling Stones (and Stevie Wonder) version of "Sympathy for the Devil/Living for the City", the Weird Al version of Queen's Bohemian Rhapsody (actually called Bohemian Polka) and the Gypsy King version of the Eagles "Hotel California".
Since these are legally (as Brian does work with ASCAP) downloaded, check them out!
By the way, if you are wondering what Sympathy for the Devil is about, check out this Lyrics Undercover which explains the song. There is also a Lyrics Undercover on "Hotel California" here.