I'll be releasing the source code this week for the generator along with a tutorial showing how to use it. You can make isometric, dimetric, top down, etc tiles from 3d models. You can grab 3d models off turbosquid or google warehouse, load them in and output a nice isolated tileset/sprite sheet.

I threw some examples of the animated sprites on a webpage to show how they work, I made each with a couple clicks: Lee's Goodies

This is a more accurate video than the one in my original post: