Here are some terragen animations that I have had a go at. Most of them are quite small frame size, due to the time taken to render each individual frame (especially the ones with water). Not all of them are perfect and the file sizes are quite large, but if you are interested, right click, "save as" and have a look.
FOR KIM:
This is an animation I did for a friend on Deviantart
EL CANG SOZI:
This is an animation I did that kind of grew from a single image. It grew and grew and consumed an awful lot of my time, but I am very pleased with it. I have posted it here in a few different flavours, MPG (40.13MB), DivX (78.69MB) and WMV (34.62MB) Sorry about the file sizes, but I didn't want to drop the picture quality too much. The DivX is the best quality, the MPG is the next best but has a green edge on 2 sides (I left it like that cause the other software I have for MPGing gave a worse picture quality for the same file size, with no green edge). The WMV isn't that bad either. Both the DivX and the MPG are zipped files and the WMV is "as is". I hope you'll take a look.