Learn 2.5 and Second Life

I don't think that OCLS competes with Second Life, I am, however, amazed at the possibilities for uses of Second Life. I've not felt any real need to explore SL, but as I learn more and more about it, I'm sure I will at some point soon. Especially since if more and more schools are using SL for interactive learning, I know we'll see more questions regarding virtual worlds.