This discussion is turning into useless vcs advocacy.

The funny thing is that we (or at least I) don't have  a clue how the  
system is going to work and yet we are already discussing  
implementations details, namely choosing a vcs that I don't know for  
what it will be used for.

Convince me first that a vcs is needed and then we can talk about  
which one. The OP should have make an architectural proposal, but  
there is no such thing in his message.

It is not because there is now a cute [OSR] tag to put on discussions,  
that they will automatically become interesting. Some quality in the  
formulation of proposals is needed.

Best,

Daniel