There is a new wiki in town: the "Second Life Business Communicators Wiki"! To state from their first page:
This wiki is intended to be a collaborative resource for anyone interested in business and communications applications of Second Life, virtual worlds or 3D user interfaces.
It is in its infancy and is by no means exhaustive, complete or ready for prime-time. This is just a start, but it will continue to grow. Contributions or ideas on what resources you'd like to see here are most welcome!
So it is for sure worth watching if it is able to get a decent community.