Really? Only 100 people per server? I assumed because Massively was covering it like a real MMO, that it was. I would tend to agree that 100 people on a server at a time isn't really achieving the "massive"

Ahh, here is from their FAQ:
Approximately 10,000 players per world consisting of 100 player district maps. A hundred customized players driving unique cars, doing crimes, shooting or busting each other is well worth checking out.

So it would seem that the world itself can have 10k. Then there are 100 instances or zones that can hold 100 people. I am guessing that you can go from zone to zone as long as there is room. So that is massive, just with limited movement.

So that means 100 people per server because theres no way you could travel zone to zone but have to wait until someone leaves, how annoying would that be? You'll just be on a server with 100 people at a time sooooo....... not an mmo. If 100 people is 100 then that make Joint Operations an mmo because thats 100 people. Maybe COD 4 is an mmo cause theres 64 people per server but you're playing with 100,000 people at the same time who are connected to the same server browser server.

It sounds like City of Heroes. Once there are enough people in a zone, it creates another instance of the zone. EQ2 did the same thing.