Finelli: As an educator and member of the NMC Guests group for many years, I can report a long absence from virtual worlds. You would have seen me as inactive until very recently, had you known to look for me in that listing you mention.
After being away for over 2 years I notice many changes in the educators' footprint in world; and, not all of those changes are bad, either. The quality of designs has improved; the bar is being raised. I suspect that we are still in the early stages of discovering how this technology can augment instruction.
VRprofessor makes strong points in scrutinizing the variety of instructional use cases for virtual worlds. For example, SL seemed to be a good platform for synchronous distance learning. Yet, I was a member of a design team that delivered an elegant virtual classroom for a major university that—to my knowledge—was never used with students.
To VRprofessor: You wrote...
"Sadly the private funding for the virtual classroom is all but gone (one, possibly two more months). The good news (for me) is that I have until Fall 2014 to find some sort of replacement."
As a premium account holder in SL, do you contribute tier to the Virtual Classrom group? (Would you consider such an association...tier for access? Does the Virtual Classroom group solicit such investment?)