just a few links for samples from this forum

http://www.goldbaby.co.nz/freestuff.html (class 808,606 samples run through valve amps)

http://www.bangingtunes.com/misc/royalty-free-samples/ (not tried these)

http://dnbwiki.com/index.php/Free_Samples

http://hosted.filefront.com/psitech