New Scientist and the University site itself. They have a download too for Limewire Credence.exe Thought I'd grab a copy but haven't yet got round to trying it. Sounds like a more rigourous Bitzi look up type of thing in its effect.

http://www.newscientist.com/article.ns?id=dn7179
http://www.cs.cornell.edu/People/egs...nce/index.html