We're going offtopic, but I don't mind.

Well the mythical RakNet/3DGS merger will be there, and it's not so mythical really . Like you, I used to be convinced that everything can be done using 3DGS native MP. And indeed 90% can be done if you try hard enough. It's only 3 months ago that I got the idea of integrating RakNet, and I hardly knew any C++ then. So I started learning C++ and started work on the plugin a month ago. And I've been very busy with my exams (as a matter of fact I have my final exam chemistry in 2 hours from now). So that's to say that it really isn't difficult and I don't understand why nobody has done it before.. It's just a matter of writing dll functions that call raknet functions.

Personally, I like network programming and in general: do things on my own; I'm an engineer. So I'll stick with 3DGS. But multiverse might very well be a good choice, considering your needs. It looks pretty solid. If you do decide to leave 3dgs, ricardo, be sure to keep us posted on your progress!