We are building one since almost 10 months. It is just a week or two away from feature completion of v1. Hope to launch it soon. We have some innovation baked in and some coming later.
What do you have in mind? What kind of innovation or features are you thinking of?
Given that you'll want to save details for your launch, I understand why you can't give too much away but... could you give a hint at how your project aims to innovate?
Is it completely outside the known social media paradigms (microblogging, communities, review sites, etc), does it spin or combine them in novel ways, or "just" add original features to one or more of the existing models?
A key feature we have is "Live" comments, just like facebook feed, this is live feed of comments, this way without clicking, user can navigate various new posts and comments. This is available at