Kiest will be in charge of commentary since, well, it is his event. I want your input on just about everything though Panda; I want to make commentary a staple, and I want to find out who is good at it and how they are good at it... we need to get some good pairs going and figure 'em out.
The two people on rotation are always a good idea.
Hm... well, for the most part I guess you could separate people into two categories: Play-by-play commentators and color commentators. The play-by-play commentators are the ones who are dry, telling it how it is, and give the sports-like commentary to the matches which keeps people informed. The color commentators interject with interesting tidbits/humor/hype at the right points which keeps people entertained. Obviously, the play-by-play commentators talk the most between the two.
So far, there has only ever been one play-by-play commentator for Smash that I know of... Me. I just need the right color commentator who meshes well with me. The downside to my commentary is that I'm dry as hell and I can't make a funny worth a ****, which is why I need a good color commentator by my side. So far the best co-host I've had is Dmbrandon because he's hilarious and knows his stuff (Omni is also one of the better co-hosts I've had because he knows me well enough to interject at the perfect times).
I suppose if you really want to somehow mainstream this, you can have people sign up beforehand (or via a signup sheet at registration) as a play-by-play commentator or a color commentator, then mix and match.