OK, so I intended to create a comprehensive list of tutorials. I haven't exactly succeeded yet, but here's something to be going on with...
AUDIO TUTORIALS RESOURCE LIST MK I
Note: some of these tutorials may be for earlier than current versions of the relevant program.
MUSIC THEORY
Music Theory 1: Scales
Music Theory 2: Chords
Music Theory 3: Basslines
GENERAL RECORDING/MIXING TUTS
Home Recording
Recording on PC
Some recording tutorials
Some basic recording tutorials
Tips for recording vocals
Recording guitars & vocals
Software Synths and Sequencers
Analogue Synthesis for Beginners
Audio Editing Masterclass
Using compression
Using gating
Using reverb
MIDI basics
MIDI: the ins and outs
Beginner's guide to mastering
Mixing and Mastering
Mixing tutorials
Guide to Remixing
202 Power Tips
SPECIFIC PROGRAMS
If you use these sites as a starting point, many of them offer links to other relevant sites
FRUITY LOOPS
Fruity Loops online manual
fltutorials.com
FL: Basics
FL: Piano Roll
FL: Piano Roll 2
FL: Adding a wav channel
FL: Adding a VST channel
FL: Using Effects
FL: Tutorial
FL: Making beats
FL: Bass using OSC
FL: Using plugins
FL: Making DnB
FL: Making DnB (advanced)
CUBASE
Cubase: some bits
A few basic tutorials
Coudn't find too much on Cubase
REBIRTH
ReBirth
REASON
Basics
Reason tutorials
Discover Reason
List of sites with Refills (bottom)
ReasonFreaks tutorials