Both of these came from the tech-rhet mailing list, and they are both things I might have to contemplate including in English 516 next year:
“Angel Learning Island and Second Life”
sloodle, which I guess is some kind of combination between moodle and Second Life.
I have to say that my limited experiences with Second Life so far have suggested to me that it is, um, kinda goofy. But then again, I was not a big fan of MOOs either.