Crazy question, perhaps, but I heard someone saying it might be possible to roll more than one multi-site installation of WordPress into a single install via one set of core files with multiple databases for each multi-site instance. Correct or no? My guess is no. Andrea? Any plugins out there to accomplish this?
Reason I ask is that I've got a couple of multi-site projects looming, and it would be nice to somehow roll those in to one installation of core files to streamline things ... upgrades and such.