Hang him! Hang the bastard!

thats why they're called Insomniac , they work all night. :]

insomniac itself is 145 people as of 2008 with sony providing additional people for the roles of testing, localization, pr, as well as producers.

Put it this way, they are a team of brilliant people.

A game a year is something else. I doubt any other devs of comparable size could accomplish the same.

^
They've got a great system working; one team on Ratchet, one on Resistance, and one that moves back and forth. That way, they always have two games in development at the same time, and they can keep them coming one a year.

We can expect to see more eventually, with the new studio having been open for about 6 months now. I wonder what they're working on... Probably too soon to find out.