Back on topic: the fact there is no active multiplayer project at the moment is a good point to answer the question of RacerX regarding why not using it. Now. It might have been different back in 2009.
Do you only speak Spanish there, STS? Or is it an international group?
Thanks for returning to topic
For the moment, it´s only a hispanoparlant group. But a ambitious project is on the scope, for a future, of "opening" the group and being international.
About OMP, we had multiple tests with it in the past, but it 'thraumatized' us, because the lack of rotation in the 2010 days, and the problems with time accel, and weird things docking and problems with DG-IV.
For now, Orbiter Master:Slave looks interesting, but we haven´t tested yet.
About vMC, we used it in the last months of 2009, and the first of 2010, but then, with Orbiter 2010 and Orb:Connect, we developed our own mission control consoles.