Check 'em out...

* Modest Mouse "Gravity Rides Everything" (used in the Quest Commercial)
* Modest Mouse "Float on"

Here's another site that talks about a lot of commercial music, which is where I found these titles by Modest Mouse. I was looking for them too, and scored the names there.

http://digitalmusic.weblogsinc.com/entry/2746421320817397/

Cheers.