Unfortunately, neither the library or my home network really has enough bandwidth to show Second Life to its best advantage. Sometime, I would like to get on the site and really play around. However, I am not sure about that flying part :>)
I did go to U-tube and check out several videos. Some of them were just plain weird and some of them told me how to make objects on Second Life. I don't plan to get that involved with SL. However, I liked this video. It was sort of like a vacation (as promised): http://www.youtube.com/watch?v=EgtGcTHL2dI
I was glad to hear from Jaime that her professors were using Second Life. I do think it has some very practical as well as some very fun uses.
For me, if I am going to spend time on the web, I am looking for mindless activities like Bubble Shooter or Tetris. I work my brain hard enough at other times.