To me, photo sharing isn't a solved problem. But honestly, who cares if it is? When Google came on the scene, a lot of people said search was a solved problem. So what did they do? Made search better/easier/faster/insert adjective here.

The same thing can happen with any startup. You don't necessarily have to identify an unsolved problem -- you just have to solve the problem better than anyone else.

Ideas evolve over time as the problem and the need becomes clearer, feedback is provided, and these startups just get better at what they're doing. Let's cut these guys a break, give them a little support for putting themselves out there, and provide some constructive feedback.