An update - Nabuur does seem to be 'back in action', and I've been in pretty regular touch with the facilitators of the project I've joined.

(shameless plug - my particular project's located here if you're inclined to have a look - it's to help start a youth sports program in the Kibera neighbourhood of Nairobi).

Jon Alexander said:

I'm also a newly-arrived member of Nabuur - I've been a bit frustrated by the inactivity that seems to have followed a recent upgrade to their web site, but I'm optimistic it will start 'hopping' again soon.

A very neat idea, and intriguing implementation of online volunteering.

[Edited by Jon - typo]