[mootothemax]

Sounds rather like Digg plus a mobile app. That said, if you think it'll be the next Reddit, go with it! Just do lots of research and make sure someone hasn't failed previously with the same idea - no point wasting your energies if it's already been proven not to work :)

[m_marker]

It kinda sounds like Reddit and Digg but the social model is very different and it also focuses on privacy and user engagement.