Rich Darby-Jones has populated his site with a number of tutorials on a number of different topics from modeling and texturing a alleyway to utilizing multi morphing, creating a engine flame and the basics of motion mixer. He's also put up a number of useful plug-ins and utility items:
Nulls (new) is a collection of various null custom objects from cars to numbers and letters.
Object Cutter (new) "selects all attached polys and places them into a new layer, repeats until all the separate objects have been placed into an empty layer."
Raytrace Options (new) is a simple script to turn on all your raytrace options at once.
Lights2BGRad (new) will quickly turn off all your lights and set up a basic backdrop radiosity scenario for you.
There is also a collection of 46 single pixel color images (for using as BG image etc...).