Wow, guys, way to show the support.
First song I learned on the bass was Korn's Blind. If you have a four string, It will require changing the tuning of the strings from standard. It's pretty much 0-2-0-3-0-2-0-3--555 on the E string, tune it low enough so 0 is the same tuning as the song. Its like a drop B, or C# something like that havent heard it in a while.
Bands like slipknot and korn can be pretty hard to start out on. Feildy uses an unusual slap technique and almost plays the bass more like a drum than a bass. And slipknot has some pretty crazy riffs. I'd suggest learning wait and bleed by Slipknot, not too hard.
Yeah sorry i can't offer much suggestion in korn and slipknots newer stuff. I listen to totally different music now. But I wouldn't be where i am today, and probably wouldn't know who jaco past, marcus miller, claypool were if i didn't get into bass through nu-metal.
And for all you jazz heads, really old slipknot with some serious funk flair to it
http://uk.youtube.com/watch?v=YhPsOAQhTxI
Listen to all of it, but if you are impatient Check out 1:40 in. There's actually some pretty sick bass in the song.