[cd34]

Well, I guess it depends on the question you are really asking.

Formally, 2 corps, 1 LLC, soon to add another LLC. Each has its own niche even though it is me that ultimatly decides what gets done (and my accountant tells me which company gets the credit for the work -- although that's pretty well defined now and has been for a long time)

However, you ask about domains -- I own a several hundred. There are probably 10 'groups' of domains that were registered for particular purposes. So, maybe that qualifies as a 'company'? I.e. one batch of domains is for a particular viral marketing project I've played with for years. No real relation to any other real business, just something I've played with from time to time.