Chronicle Careers: 11/12/2007: Second Life, Revisited
I think Michael Bugeja does a wonderful job pointing out some of the important issues of Universities in SL. However, his tone seems overly cautious for something as flexible and adaptive as Second Life. These issues are not reasons to turn and run from Second Life, but instead things that need addressed and resolved be each University using SL.
This definitely isn't the first time the idea of and "Education Grid" has come up. They've been discussing it on the SLED listserve for years. While it may have its benefits, in terms of security, it may also cause a disconnect between grids... I certainly would not want to log out of the main grid to log in a separate avatar on the educational grid to attend an art gallery opening at BGSU's island only then to repeat the process to visit more galleries.