Massively multiplayer?

Blitz3D Forums/Blitz3D Programming/Massively multiplayer?

I wont bother to go posting pages and pages of wisdom here, Instead I'll have a chat about it, should be a lot more helpfull as I can't decide on a correct client-server architecture, packet frequency, packet size, database type, data persistancy, network/gameworld subzoning and distributed server architecture, based simply on the term Massively Multiplayer... ;)

(Should anyone be wondering what some of the things I'm talking about are, feel free to ask, I have experience on a commercial MMORPG)