after attending the old NE gettogether, I have some suggestions about how you could improve upon the gettogether format. One of the problems were that there were so many big amps going the whole time that you couldnt hear what any of the basses sounded like, or what any of the players sounded like either, and it gives you a headache after a while listening to like 12 basses going at once.
Its kind of lame but I think I would suggest having a holy sceptre or something that gets passed around and whoever is holding it gets to cut loose on all the basses and amps. Maybe you could do two at once or whatever would keep the volume under control. Otherwise I would bring along some headphone amps or something- its a kick in the pants to play all those instruments but its not as much fun if you can't hear what they sound like.
Also somebody should bring a drum machine or some drum loop discs or something and keep it going to whole time for people to play along with. Even if there were 12 guys playing it wouldnt be so bad if they were kind of synced up to something