Studio Links:

Ableton - Loop sequencing software with a unique interface for live / dj work
Access - Virus series synthesisers (so where is the TI guys?)
Apple - Nuff said; Mecca for Logic, Waveburner, G5 PowerMac and G4 PowerBook
Clavia - Manufacturers of the Nord range, prince of all analouge modelling synthesisers
Mackie - Quality audio gear from the USA
Native Instruments - Virtual instruements and Traktor DJ Studio
Novation - ReMOTE 25 and the X-Station
Numark - DJ Mixers and Turntables

Record Shops:

Juno Records - Quality online record store, plenty of mashups and bootlegs here!
Hard To Find Records - These guys won't let you down - found some rarities here
Track It Down - Never used these guys, but friends say they are pretty good
Beatport - Excellent MP3 download site - all the labels, and no DRM in sight
DJ Download - DJ Magazine's MP3 download site
Vinyl Addiction - Good selection of tunes here
iTunes - The corporate model. Very few labels, but the popular choice for iPod users

Labels:

Distinctive - Hybrid, Ils and Way Out West
Fingerlickin' - Plump DJ's, Krafty Kuts and Lee Coombs
Marine Parade - Adam Freelands label; Evil Nine, Fex, Forme
Mob - Nubreed, Santos, Beber and Tamra
Kingsize - Meat Katie's label; Elite Force, Dylan Rhymes
Supercharged / Against The Grain - Breakfastaz, Skool of Thought
TCR Records - Blim, General Midi Koma and Bones