grouce : Animated visualization of source code history

This is great. Codeswarm is another project with similar aims. I remember a visualization of LLVM's svn history about a year ago:

http://vimeo.com/1246374

Grouce has a nice improvement where the contributor's commits are shown, rather than vaguely flying towards the center from all directions. I also like how an inactive contributor drifts out of view. Nice touch!

I preferred Codeswarm; it better depicted what was getting edited a lot, and also general edit volume over time. If Grouce could add these things (or if Codewarm could make it clearer would was performing edits) that would be awesome.

It would appear the name is actually :: gource

http://code.google.com/p/gource/

Are there some nice visualization tools for Mercurial?