It's "Somewhere I Belong" by Linkin Park off their new album, "Meteora", coming out March 25, 2003. The vid for the song is in that flash navigator too. it's in QT. Be sure you pick which video you want to watch before you choose player and connection (even though there's only one vid). I spent 15 minutes trying to get it to play before I figured that out.
btw - The songs seems like it could turn into a sports anthem, or a song that's played durring a sports montage.