The theme song for Bones is by The Crystal Method.
On the original Bones soundtrack cd you'll find the original theme song by the Crystal Method and a longer version which is a remix by DJ Corporate.
The Crystal Method consists of Ken Jordan and Scott Kirkland. Their first album 'Vegas' came out in 1997 so they've been going on a while now. Their fourth studio album 'Divided by Night' is due out in May 2009.
While their work will surely be worth your while, I have to say not every song is as catchy as their Bones Theme :)
Hope this helped, I will add a Crystal Method video so you can get some idea of what they do besides making theme songs :)
The soundtrack album titled Bones Original Television Soundtrack, produced by Maria Alonte McCoy and Billy Gottlieb, was released in 2008. It contains 13 songs recorded by popular artists for the show.