Perhaps there are others in the XOOPS world who share my interest in this domain.

I am in the process of discovering & testing a number of Social Networking / Collaboration Tools; all those I am working with are either Free or Open Source. I have noted my opinions on several (in terms of simple rating scores.

The full list of those I'm working with may be found at:
http://processteam.org
(in the Work Collaboration) Block in the center of the Main Page (no registration is required).

If you know of other tools I should include in my list, please add those here (or email me through my site). If you are interested in adding any into XOOPS for use as a module, please contact me, too. I don't have the skills to pull that off, but am willing to help.