As with every BlizzCon, the community-ran IRC chat channel to discuss all things BlizzCon is back again for this years edition!
During BlizzCon 2009 we had over 400 people in the channel, with a record of ~1550 in the previous year. It was an extremely fun experience!
We have a mini-site where you can use a webchat client and keep an eye on the schedule (in local time, with countdowns as seen on MMO-Champion). Click!