First of all i would like to say that is a beautiful site!
I like the simplicity of the design and the colors, too.
Other than that i would like to say DON'T sell it right now.
If you find the time try to officially launch it, get some members, let it run for a few months.
Considering that the .com one is not online yet, you could get a great part of the pie by building a strong brand name.
If you sell it now there is no way to get back your 57 BTC investment. The domain name could sell for some $$$ or maybe $$$$ but the site itself is not adding so much (no content, unique design? no members). So basically you are just selling the domain.
But if you establish a brand name you can sell it later for much much more.
That's my opinion.