Computing with bubbles

''MIT researchers are using bubbles to do computation on "labs-on-a-chip." The novel processor is a microfluidic chip containing a network of hair-thin plumbing pipes with nanofliters of fluid pumped through them. The architecture enables the presence or absence of a bubble to represent a single bit of information'' [source]

I can remember reading somewhere that given the bubbles tendency to wrap the maximal volume with minimal surface, they were used (once upon a time) as calculators to solve complex math problems... I will try to find news of that, and blog about it :)