@ Swordmaster: Don't get me wrong. I have no problem with challenges but I just don't see the point in doing so in an online tournament. Challenging is attractive for real life hammering, when you get the chance to play someone only once in a year or smth like that. Some ppl don`t use/like UB so that`s the only chance to play a game with each other. But we're all online and you can play whoever you want, whenever you want.
One game per week sounds good in my opinion. I'd be rather harsh if someone wouldn't show up within a week and count it as a 0-20 agsinst the missing player but 10:10 is alright I guess.
I highly recommend to introduce the scenarios to the tournament aswell. I'm pretty sure that the restrictions are written around them and it forces people to take a risk if they're playing smth stupid like a big fat Ogrebus oder Highelvebus with 6 chars in it, without any other units around. I really like them a lot and there is still a chance to play the "regular" battle.