LAST EDITED ON Jan-17-09 AT 03:04 AM (PST)
 
Here's some resources for videos:

Backgrounds, stock footage, animations:
www.DigitalJuice.com
www.istockphoto.com
www.actionbacks.com
www.animationfactory.com

Royalty Free Music Beats:
http://www.beatslocker.com/
WSO ($47):
http://www.warriorforum.com/warrior-special-offers-forum/25202-unlimited-instrumental-music-tracks-forever-just-47-no-recurring-fees.html

(free) Copy "left" and public domain music:
http://opsound.org/

Edit: Added http://www.jamendo.com/en/ (On Jamendo artists allow anyone to download and share their music. It's free, legal and unlimited.)