I just saw these cheap pnuematic valves:
http://xmajk.en.alibaba.com/product/437 … Valve.html
A minimum order of 300 is a little out of my range, but if Sparkfun would offer them (even at twice the price of $4 each!) I’d be very happy to have access to them. A kit of the mini-pump, 6 actuators and some tubing that fits it all would be pretty amazing too.
Cheers,
James.