Audible Scene

I found a few good sites with plenty of sound effects.

http://www.stonewashed.net/sfx.html (a directory of sound effect sites).

http://www.soundhunter.com/

http://thefreesite.com/Free_Sounds/Free_WAVs/index.html (some good sites posted on here).

http://www.grsites.com/sounds/

http://www.partnersinrhyme.com/pir/PIRsfx.shtml

Enjoy.