When to use Subsites

Great work!

I could imagine using Subsites for a project that has different offices with different campaigns (like when selecting region on apple.com), and that this could work well together with language localization settings also, using a path rule for setting both subsite and language?

If that's the case, I have a feature request: User permission to add, edit & delete nodes for a certain subsite. I checked out the interface, and it might be that I'm reversing the flow of how it works. Still, it would be nice to have subsites with one manager for each subsite, and an admin that could handle content shared between subsites. Any thoughts on such a usecase for the module?