How hard is your problem?
cousin_it: I'm solving a newish problem, posed (but not yet solved) by MS Photosynth: build an immersive, 3D-like experience from photos. But then again, I'm not a startup, but a one man nonprofit/research thing, releasing my code under the GPL. http://openphotovr.orgMy next project is definitely gonna be a for-profit in some other area. Still deciding where exactly.