Here is a great resource site for WAV files. They have various sound clips and snippets that you can use to make prank calls, annoy your co-worker, or use in you very own Podcasts.
Check it out here.
Welcome to the Skeleton Crew! A collection of odd trinkets of Technical Know How, Gaming Goodies, Weird Science, Carnal Knowledge and Various Resources, that I have stumbled upon in my journeys through cyberspace.