Yeah, that's what I meant. Such combination is an interesting one. However the critical thing (besides design) is how are you going to attract the required mass of users to keep it vivid. So far there's little incentive to put my content there, and without content there's no incentive to visit the site. The loop is closed. Maybe you could consider an easy way for users to automatically put their content from other places, via RSS for example? That way you could focus on the discovery not content creation.