I'm ready to help :D
But first explain your idea better, the tournament system that is - how will be pairs for 2v2 decided? which pair will play which pair? score system? special prizes(:D) ?
About 2v2 tourney in common - sounds like the best for me - QWATRA TANX section on tanxguide reseted, winner is ftw_solo :p So now we start #2 ROUND!
And about Duel tournament - well, we have LetterTourneys, however, having tournament for EVERYONE would be a nice idea, too. Besides, for those who haven't checked request/suggestion forum yet - do it now :D
Yours NW