At first, Xan, this is a great idea. But I can only re-remember you on things other people already said:

1.) Often mentioned: the timezones. That way, there can perhaps be something like USA (or Canada ) vs. Australia...but it will be a really big problem to let some European team duel versus the Australian one. That way, the Northern American teams got some kind of advantage, I think.
2.) The location where people come from. If you don't mind the countries they enter at location in this forum , there'd be too much problems with the balance: like Rage said, there'd be AT LEAST four or five dutch teams, and if you let all those new players that go the special edition make teams (OK, they won't have a chance versus other ones!), there could be douzands of dutch teams. This shall not mean this is an advantage for the dutch, but it's sure hard to organize sth like that.
In addition, there are some countries where at all too much jazzers come from. For example also Germany. Yes, there are, perhaps hundred active jazzers, but not even 20 of them got 1.23, I'm sure. The only ones I know that got this are Aiko, Mirrow, me , Patar, and SonGoku. That's too few for a team, I think. There should be more ppl for substitutions.
3.) Perhaps the smallest problem: the organisation of the whole competition and of the single teams. I think there'll be some people like the JDC-Admins that will organize this. But the even bigger problems will be the single teams, I think. In the "better" teams with good&experienced players, it sure won't be a problem to decide who'll be captain. But what in that teams of new Jazzers? There'll sure be a few that'd like to take part in this competition...

OK, I mentioned enough bad things. Now I can only repeat that this is a great idea worth a trial.
If some people should decide to organize this, I'd like to help them. If you are one of them, and would like me to help , plz contact me: webmaster@j2f-clan.de. Thx .

That was all! Let's ry it !