BreakBeatsOnly.COM :
UK based sound samples and loops covering various genres including drum and bass.

LoopAsonic.COM :
UK based free downloadable sound samples and drum loops covering various genres.

Paranooyer :
Netherlands based with links to sites containing sound samples and audio tools.

SoundCavern :
France based with links to music sites.

BreakBeatZone :
Russian based with audio streams and DJ mixes and sound samples.

HQSamples :
Russian based with DJ mixes including links to acapella sites.

FruityLoops :
USA based Looping software with tutorials and links to sound sample sites.

Other Links:
A list thats been flouting around for afew years....

Loops for Acid - www.acidplanet.com/downloads/8packs/
Findsounds - http://www.findsounds.com/ISAPI/search.dll
Synthzone - http://www.synthzone.com
Bass and Trouble - http://bassandtrouble.com/sounds/wavs3000/wavs3000.htm
Bass Culture - http://www.bassculture.org
Deltaz Samplez - http://www.deltaz-palaze.de
Dooley Drums - http://www.dooleydrums.com
Drum Loop Central - http://www.geocities.com/~junebugtd7/drum_loop_central/
Phat Drum Loops - http://www.phatdrumloops.com
E-Lab - http://www.e-lab.se/
Electronisounds - http://www.electronisounds.com
Future Wave Shaper - http://www.futurewaveshaper.com
Rob Papen Sound Design - http://www.robpapen.com
Sound Central - http://www.soundcentral.com
Soundsproz - http://www.soundproz.com
Wave World - http://www.modarchive.com/waveworld/
Joor - http://www.joor.com
Drummachine.com - http://www.drummachine.com
Bizarre Ambient FX - http://sonikmatter.com
Oberheim Matrix-12 Samples - http://matrix-12.tripod.com/home.htm
Samples4U - http://go.to/samples4u.net
Xelenio - http://www.xelenio.com