In the Lord of the rings site, there is what I would call an RIA. You can see how things were built by video with audio, and just in case you don’t have audio, there are comments that run with the video on the side. Also 3 different sections that are viewable. Easy to use, easy to understand, very well built I think.
On a side note that doesn’t have so much to do with flash, I really liked how they explained about lighting and effects they did. Very very interesting stuff I think, definitely something I’d like to get into. The lighting alone can change the feeling of a scene completely. Not only that they have normal people, graphics, 3d models and effects that all have to match up. I’ve tried this a bit with some keyed material that I shot and it’s definitely not easy. Takes a good eye and a lot of checking. Make sure you have a quick comp if you’re going to get into keying and effects.