Leatherface - Candle In The Wind

Nothing like having an Elton John song played in the style of Motorhead by a bunch of big fat hairy bikers :D

death letter - the white stripes
(org. by son house)

elanor rigby - thrice
(org. by the beatles)

Tool - No Quarter

Alien Ant Farm - Smooth Criminal

I hate Michael Jackson's version of it but I love this one especially the guitar in it, simple but catchy:)

Le tigre - I'm so excited. I Hate the original one but i think Le tigres version is great, more energetic.

yes!
i totally agree
& the videos cooler too

The Dillinger Escape Plan: Jesus Christ Pose. Orginal was ok, love this cover

Local H- Toxic
heh.

I may be in the minority here, but I liked Marilyn Manson's version of Tainted Love better than the original.
http://www.napster.com/player/tracks/13749400

Get the Party Started - Cobra Verde

there are a few other good covers in that album