Hey! easy there fella.... we had screaming wifi and internet at www.techcrunch50.com !!! (for 2.5 out of three days that is!).
Note: I've figured out how to get wifi to work at a conference.... run ethernet cables to everyone's seat.
Seriously, that's how we've solved the problem. I've told the tech people every year that wifi sucks for large groups, it doesn't handle 1-3k connections in a 30,000 square foot room and that ethernet cables are rock solid.
every time the techs fight me, every time I force them to run ethernet and every time i'm right.
very frustrating... i will NEVER use wifi as anything other than a backup at a conference. Run ethernet cables people... it's really that simple. also, get three different connections and run three separate networks for each 1/3rd of the conference. then if things go down at least 2/3rd of the people are up.
http://www.onemanandhisblog.com/images/2007/Loicandjason.jpg