Two things I think will help you:

1. Leverage other social networks

I know it sounds ineffective, but other social networks are a great channel to go through if you make sure people understand you offering more than they can find there. Think Pinterest, who also ask you to sign through Facebook.

2. Provide guarantees you will not be a place for creeps

This again can be achieved through 1. Think Chatroulette here. Phenomenal space for people to communicate but their efforts to dwarf the creeps came in too late.

Besides these two points, here are less important ones:

- I think your value proposition needs some work. Start with examples first and highlight your strengths (the fact that this leverages people around you).

- Communicate why usernames such as mine are not valid.

- Why is it that your Facebook posts redirect to your homepage?

All in all very good concept and a lot of potential. By the way you guys are not English speaking right? ;) I recognize it from how your keyboard renders the apostrophe.