Increasing DB numbers, how easy is it?

Hi Everyone,

I'm about to install this on a fairly new blog with a database of about 700 tables so far. Not sure exactly how many blogs will be created, I'm guessing it wouldn't go over 10,000 for at least a year or two (if not longer).

Can someone let me know if it's possible to upgrade / increase from 256 to 4096 databases once it's been installed?