There have been multiple (unofficial) German graalian conventions been already, organized by Atlantis players. I was not there, but as far as I know, they hardly did anything graal related
I do not know many German graalians very well, so I would prefer to meet 2k2 people, but, well, America
I suggest all you people get your exact coordinates and calculate the "average" of it, which would then be the place where you should meet. (Do not calculate people from other continents in there or you'll have to buy a big ship or something)