SCM and development workflow with aegir/multisite environment

Hello,

I am looking for ideas to organize SCM and development workflow for distributed teams with aegir/multisite environment.

Here is some initial thought:

• Each developer will have multisite or even aegir environment if applicable;
• Staging/production server will have aegir;
• Every custom website will have it's own scm(we using git), for custom theme at least and custom modules at most;

Now developers have to checkout sites into their local environment and push it back when they done.
It's makes me think that it would be nice to have some kind of scm integration inside aegir, i.e. to simplify forking process...

If you have any thought, please drop it here :)

Thanks.