These new fangled digital conferences often have what is known as a "back channel". From the links at the top, you can now drop into the Chat page.
For those that are IRC enabled, find it at irc.wyldryde.org, in the #northernvoice room.
There's an overly technical description of what IRC (stands for Internet Relay Chat) is about at Wikipedia. The short answer is that it's a group chat application.
Drop in to the northernvoice chat channel to see what other attendees (or watchers from afar who couldn't make it in person) are saying about the current speaker, the best blog post, or possibly just the best place to go for lunch.
If you're bring a laptop, esp. a Mac laptop, look for people sharing their music, photos, or maybe helping to take real time notes using SubEthaEdit. I expect the recent changes page on the wiki will also be humming.
Whew. That's a lot of information to digest. Take a deep breath. At the conference, try another form of back channel: turn around, look at the person directly behind you, and introduce yourself.
See you in a couple of days...