I'm not here to prosthelytize social networking, if its not for you so be it, for others there is value and enjoyment and I'd hope the potential is much bigger than the fans helping push the interaction, be great to see something like the Penguins offer which surely was posted somewhere else here:
http://penguins.nhl.com/club/page.htm?bcid=29935
But if a good number of fans with smartphone devces at the game can't have quality internet access it makes some of this effort moot. At MSG where similarly AT&T 3G service is bad (seems to be the case in most arena/stadium environments) I can jump on wifi via Optimum Online wifi service they broadcast (have to be a Optimum customer though).