Here are a few free music and sound effects web sites.Enjoy!
http://www.freeloops.com/ - free wavs recorded by great inspiring musicians, from FX sounds to hip hop samples and this in many different instruments.
http://www.f7sound.com/snd.htm - scroll down and on the left side it will say "free stuff!'
http://freesound.iua.upf.edu/ -The Freesound Project aims to create a huge collaborative database of audio snippets, samples, recordings, bleeps, ...
http://music.podshow.com/ - Musicians submit thier mp3s for people to use(and credit)freely.