The name of the song is :Rundown-Dorothy's wake up call
The Composer is: Toshihiko Sahashi
The anime Show where it was taken is called: "Big O!"
A place where you can find a listenable version is: http://www.savebigo.com/modules.php?name=Soundtracks

I'm not sure if its the same one, but josh transcribed a song called Rundown from Big O.