Links

Beatmaka
A good tutorial on mixing.

The Project Studio Handbook
The Project Studio Handbook has a great database of articles on just about everything to do with audio and recording.

KVR VST
All the free vst instruments and news and reviews of commercial instruments. Nice.

Steinberg
Of course

Propellerheads

Native Instruments
They make some great stuff.

Music XP
Nice tweaks for XP for audio work.

SOS Magazine
Good info in general, they have a Cubase column that becomes available to non-subscribers when it becomes a couple of months old, I believe.