There are also a whole world of wonderful classical music works for you to explore. Aaron Copland, Vivaldi, Beethoven, Grieg—the list goes on.
Mostly acoustic, but damn they is some good stuff. You’ve probably heard a couple of their songs on alternative radio, but I swear, their “Interventions & Lullabies” CD was my favorite disc of 2003.
Start with “The First Single” if you’re downloading. If you like that, look for others.
Bix Beiderbecke. Click on the sample licks from Baltimore or In a Mist. Or try this CD and listen to Jazz Me Blues or Mississippi Mud.
If you like rap, you would probably like Bob Dylan.
Bringing it All Back Home or Blood on the Tracks are two great albums. Heck get his Greatest Hits album.
Personally I like Elvis Costello. Get his greatest hits album for most of his earlier good stuff.
Maybe I can’t post coherently. Read “I can.”
Evil Death, I’m listening to the Oliveros track your recommendation right now. I’ve heard her “Bye Bye Butterfly” before, and it was decent, but it wasn’t really the type of thing I’d listen to for fun. As for this one, I’m surprised that this perfect echo has its origin in a real space. I usually like the faster and more spastic stuff, but this is cool.
Holy crap, I’m going to be giving a lot of money to iTunes! 
Another artist I highly recommend, and didn’t think of until I saw the title of this thread, is Joe Jackson. I didn’t discover him until maybe 10 years ago, but since then 1979’s “Look Sharp” has remained one of my favorite albums. I still remember being completely shocked to discover that Anthrax’s “Got the Time” was a cover! 
No Cowboy Mouth?! Blasphemers!! 
Thanks for the O.A.R. mention…I like what I heard in preview, and plan to download that same album now.
I’m probably going to download about half of the “Interventions & Lullabyes” album (I didn’t like the clips of the slower songs, but the others sound pretty cool!). Thanks!
I don’t think anyone’s mentioned Bobby McFerrin. He’s worked in every genre and collaborated with a huge variety of musicians. Hush, with the cellist YoYo Ma, is really beautiful, and YoYo Ma is someone you might want to know about anyway.
Heh, I have Hush but haven’t listened to it in years; maybe I should again. I liked the part where Yo-Yo Ma starts playing an octave on the cello for some Bach piece and Bobby McFerrin is reminded of “Purple Haze.”
Thanks I will let you all know what I think as soon as I check a few of em’ out
The original Man in Black, Johnny Cash.
I will try not to cover people mentioned here already:
Flogging Molly - a cross between Irish folk and rock (like punkish flavored). More Irish than U2, less Irish than Clannad. Also seriously rocking band. Go to their webstie they have some sample videos and songs.
The Reverend Horton Heat - Rockabilly mixed with some punk and country. Very good stuff. He can range from the harder edged (the liquor in the front album) to the more rockabilly (The Full Custom Gospel Sounds). DOn’t let the name fool ya, he’s not a religious man.
I also highly reccomend Faith No More - greatly overlooked band. Most people remember them solely from their early 90’s album and the “you want it all” song (the song is actually called Epic). My personal fasvorite album of theirs is Angel Dust.
A single album isn’t musical expansion, IMHO. Music is an art form, and artists received impressions from other artists before them. Go back to the beginning and move forward if you truly want broadened musical horizons.
Bach, Beethoven, Mozart all had differing styles, as do Gershwin, Copeland, and Williams. Experience bluegrass-Flatt & Scruggs, country-Statler Brothers, early rock-the peers of Elvis, the British invasion-Beatles, et.al, and sub-aspects of these groupings.
Bo Diddley, Abba, Weird Al, Mary Prankster, Dave Brubeck, The Butthole Surfers, the list goes on and on.
Music is a delicious buffet with thousands of choices. Put a spoonful of many offerings on your plate-you’ll discover things to like of which you weren’t previously aware.