CNC and math-based artwork

Hey!

Well, the wife dragged me off to the art museum today and now that
I'm back, I'm excited about artwork that could be done on CNC's.
Some *very* interesting mathematical art done with a CNC milling
machine:

http://www.helasculpt.com/

Anybody on the list already doing this kind of stuff? My brother
is graduating soon with a math degree - I figure I can make him a
parabolic coffee mug or something as a gift.

Dave Kowalczyk
Ames IA