Very cool, man. Hopefully things really take off for cartridge play this generation. Once I start to get my competitive team rolling (just beat the first elite 4, so a while before I start EV training and the like) I'd like to help that happen.
As of now I'm exclusively Wi-fi Gen IV. Once BW comes out I'll make the transition. Serebii seems to be mostly centered around cartridge play, so there is at least that for we wi-fi folks even if we can't get a good scene started here. I hope we can though.