Minor issue - your front page has a block of text thats an image. As a result at least three kittens have died.

Had a quick look around. The idea seems nice, but I think stuff like this has to look more 'fun' in order to succeed. Its a really weird thing to describe, and I'm not great at articulating emotions about technology - but your site doesn't seem 'fun'. Perhaps this is just an aesthetic thing that you can solve quite easily though.

Another thing is that this seems like the kind of project that you could probably get a big viral bump from facebook or twitter. For example '@foo things @bar is sexy' and some kind of wall post spamming probably generates traffic. When you come to monetize, attaching your data to people's logins might be worth more money than your data alone.