Meeting in SecondLife wasn't even that weird for some reason. I think it's because, aside from the classroom setting, it's not at all uncommon for all of us to meet peers online, whether it's in a game like SL, Counterstrike, a community such as Facebook, or AIM. SecondLife brings all of these elements together: you can instant message each other, see profiles, and view stats. Also, we could all physically see each other, so it wasn't very different than a normal class, I didn't think. It was still very organized and efficient use of the alotted time. This type of class could also be effective in a Psychology class or something.
The guest speaker was very interesting. She was definitely an example of how hardcore people can get. I also learned this when I announced to the people standing around me on my first day to play the game "What's the point of this game anyway?" And I'm not even kidding, two people yelled "It's not a game!" haha oops! Everyone elses avatars were very entertaining. I could tell that they knew what they were doing a lot more than I did.