Have you thought about using other ways to create virtual learning environments?
Not sure what you mean here Faz ...
A virtual learning environment is not the same thing as a virtual world (as I'm sure you realise) - in some sense I guess we have created what you might call a virtual learning environment through the combination of the wiki, forum and Second Life.
We have played with a number of other VLEs (eg Moodle) and social networking tools (eg facebook, myspace, bebo, etc) are keeping an eye on other virtual worlds as they develop ...
Is that what you meant?