Hosted by Rob Redman.
This tutorial is pretty basic but it answers a few questions I get on a regular basis. It deals with animating materials and also shows how to apply the same technique to various parameters.
You may want to skip this if you are an experienced user but if you have only made stills up until now it might be worth a watch.
More tutorials at pariahstudios.co.uk and a forum at pariahstudios.co.uk/forum