User Synchronization to work with a Multisite Installation

I set up a Multisite as my master site yesterday and all the subsites were single installs.

The only problem I had with it, was that it wouldn't move across the roles of the users.

Would it be possible to add this to the plugin?

While I'm at it, it would also be good to have the option to automatically add the synchronisation to all sub-sites on a multi-site installation, but that's a different thing.