The One Laptop Per Child project recently released a large collection of sound samples:http://lwn.net/Articles/287526/
Loops, Grooves, Licks, Stings, Hits, Pads, Melodic Motives/Themes/Phrases, Sound-Effects, City and Country Soundscapes, Motors, Machines, Toys, Guns, Explosions, Swords, Armor, Cars, Jets, Pot & Pans, Acoustic and Synthetic Noises, Acoustic and Electronic Drums, Voices, Western and World Instruments, Real and Human Animals, Industrial and Natural Ambiences, Film and Game Foley, and more, more, more! This huge collection of new and original samples have been donated to Dr. Richard Boulanger @ cSounds.com specifically to support the OLPC developers, students, XO users, and computer and electronic musicians everywhere. They are FREE and are offered under a CC-BY license for downloading and use in your teaching, your demos, your research, your music, your remixes, your songs, your games, your videos, your slideshows, your websites, and
your XO activities.