I don't buy this excuse. Atlassian is anything but struggling. github and gitorious have an impressive array of enterprise customers. The longer this concept is postponed, the harder it will be to implement as similarities will diverge.
Your headline made me think you're asking for VCS stuff to be added to the diaspora project (the social network one).
It seems I misunderstood you.
Anyways and either way, this seems like a (proposed) solution looking for a problem. I'm an avid user of various VCS systems and have never felt a need to port my "followers" or such from one system to another. What exact problem are you looking to solve?
I want a pony.
Edit: Give those guys a break. They're struggling just to get the fundamentals right. This is not the time for scope creep.