While I would love to go somewhere like Germany for the next retreat, we have to be realistic in that we'll have the most participants if located within the continental United States. I know it sucks for you Euro's, but unless we can figure out how to get some major site revenue going, It just won't be feasible.
I would propose a non-MLG location. MLG was fun and all, but with a large group just wanting to hang out and get to know each other, an event kind of gets in the way. I would strongly encourage those near an MLG event to go meet some fellow wheelmen and allies (I'll make pertinent threads for them), but I think that a large gathering would be great at a normal tourist destination.
Again, my feelings may not echo those of everyone. This is a long way off, just feeling out the community at large.