The only Eastern European Jazzers I know are Elrick (Poland) and Sharky (lithuania). I guess there were more, but I can't remember their nicks...

@Aiko: The Netherlands are sure the main market for Jazz2, especially if you go after percent. I'd say that there's at least one version of Jazz for every second household in Holland .
Germany...umm...I think the game is also often sold here, but, if you go after percent, it won't even be the half of the dutch percents, I guess. But those both markets, especially the German one, don't "offer" that much players to the community. Sure, there are loads of dutch Jazzers, but if you just think of how often Jazz is sold there, that's nothing. The same for Germany. There are really few German players, and they are all less popular. Do you, ppl here , for example know any famous German Jazzers apart of Aiko and mirrow?