I personally would like to see SG get in kind of (or GG, but that's probably not helping) to possibly get a few more people in for the P4A signups, but that's just me. Either way, raising over $9000 *insert Vegeta here* in a 24 hour period is nothing to sneeze at and regardless of whether Melee gets in or not, Breast Cancer Research is certainly going to be the one who ultimately wins, and I'm fine with that.
That being said, if Melee gets in, I would cross my fingers and hope that some of the Melee players try signing up for other games, even if they're not that good at them just because it's EVO. Conversely, I hope some people would give Melee a chance too. I hope that if Melee gets in and comes out in groves, that a bunch of them will either decide to take a shot at AE2012, or go "hey, MK!", and sign up. Plus, if Melee gets in, I don't know, maybe it'll wind up featured at some Road to EVO events, and will help people in both the Melee and different branches of the FGC open up to other games so everyone benefits. Of course, this is just my "yay, make this good so everyone wins!" optimism talking.