Speaking of clamping, Toolmonger also blogged about a universal clamp. This clamp has a variety of holes (60) in which you can place pins, and these pins act as the clamp. This provides a clamp that will work with any shape! While a little pricey, I think it is a novel idea.

http://toolmonger.com/2008/12/30/universal-clamp-for-small-objects/