I am also interested in learning how to unfold and fold geometry in grasshopper. This video explores this through the idea of origami.
Check this out, this is an application of folding in parametrics, we might be able to do something like this: http://www.designboom.com/readers/mmx-architects-no-precedent-installatio
On Origami and computational methods:
http://www.tsg.ne.jp/TT/software/
http://spacesymmetrystructure.wordpress.com/2009/03/24/origami-electromagnetism/
You’ll also see a fair bit of semi-related topics from his site; Daniel Piker is the guy who coded the Kangaroo physics simulation plugin for GH.
http://spacesymmetrystructure.wordpress.com/