Searching for additional information about Elgg, I found this recent
The death of newspapers, and why it matters | Ben Werdmuller
provoking article by Ben Werdmuller, Elgg's cofounder.
I also noted
Elgg - Social Networking Software Engine & Social Publishing Platform.
and that if you start with Elgg in Google suggest, there is an increasing numger of related subjects.
Related WPW thread: