Alan Grimes wrote:
> The upside is that for something like the VMMaker, someone like me can
> publish a private version of it. I could start working with an older
> version then as the trunk stabalizes, I can use the software to
> synchronize my fork with whatever noteworthy changes were made to the
> trunk...

You can do this today. It's called Monticello and the repository is 
called Squeaksource[.com]. At Impara, for example (which is running a 
Squeaksource server), we have private versions for many of the main 
Squeak packages that allow us to update them as we see fit.

Cheers,
   - Andreas