At the beginning of CLTwordcamp, the 120 person audience was asked “Who doesn’t know what Twitter is?” It had already come up in conversation a few times. 1 person raised her hand. I am sure there were a couple other shy folks, but to say the least, Twitter was represented well at the conference.
Here is the CLTwordcamp tag on Twitter. Ben Ullman also wrote a good post on his interaction with other Twitter users at the event.