Hmmm... I guess I can only count one for us. We have a site used for collaborating with the client. Basically each client has a subsite with a different look that matches the client's look. The Home page is editable with a portal for each of the modules that it uses, file-storage, bboard and ticket tracker lite.
It has about a dozen subsites, 80 users, 400 files, 1000 post and 200 tickets.
We also have one dotLRN site. 1000+ users.
We also have some sites that does not qualify to be intranety but has alot of users. Like a site like hotmail although it does not deliver email but telegrams. A site wherein you buy online courses and view your webcasts. I guess thats it for us.