This is a pretty damn random list, but here goes:
Barry McGuire - Eve of Destruction
Beastie Boys & Cypress Hill - So Whatcha Want
Ben Harper - Ain't No Sunshine (Tom Jones cover)
Bill Joel - Captain Jack & Goodnight Saigon
Black Sheep - The Choice Is Yours
Blues Brothers - Soul Man
Charlie Mingus - Anything really, nice jazz
Dave Mathews - In My Life (Beatles Cover)
David Bowie - Ziggy Stardust
Digital Underground - The Way We Swing
Eminem - Any of his "diss" songs on Benzino or Ja Rule
George Thorogood - One Bourbon, One Scotch, One Beer
Gov't Mule - Anything. Warren Haynes.
J Geils Band - Musta Got Lost (Live version)
Jay Z & The Beatles (Mixed by DJ Danger Mouse) - The Grey Album, which is a mix of the Beatles' White Album and Jay Z's Black Album.
Zepellin - Tangerine (among 100 others)
Lynard Skynard - Simple Man
Melissa Etheridge - Any of her live stuff is pretty awesome. Her version of Bruce's Born to Run from the 9/11 concert is the best version I've ever heard.
Method Man - Breakups 2 Makeups and anything from Tical.
Biggie - Fing You Tonight
The Gourds - Gin & Juice (Country band covering Snoop)
Sammy Davis Jr. - Mr. Bojangles
The Streets - Dry Your Eyes
Van Morrison - Mama Said There'd Be Days Like This
Victor Wooten - Anything.
Wyclef - Stayin' Alive, Guantanamera
Thanks again. I'll be enjoying some downloads tonight.