I've just been listening to a presentation with slides by George Siemens from the IOC conference 2006 which I would like to share and discuss.
http://www.elearnspace.org/media/Connectivism_IOC/player.html

For minimal risk reasons we decided to go for a traditional blogger blog  in our TESOL electronic village online workshop on collaborative blogging for language teaching and learning. We had been looking at elgg because of the obvious advantage of  playing with the built-in  FOAF  - friends of a friend  technology.  But was we saw there was going to be a major upgrade, we just played safe and went classic.  Yo!  It worked. Rather that teaching something  only one of three co-moderators were comfortable with, there was more stress on adding useful features such as the flash banner from our Frappr map, a world clock, the bloglines feed (export/import of the famous OPMLfile), the delicious tag cloud, Odeo and Podomatic voice messages,  and Bubbleshare with photo and voice.

People's own blogs are linked from the mother blog at blogenough.blogspot.com

Some have also been experimenting with other blog tools, such as wordpress. But I cannot recall any elgg blogs. Well - they will find out sooner or later; we have decided to continue the collaboration. This was a  example of an all  online workshop that has worked quite well  without too heavy burden of work for us three co-moderators,mostly because we have relied on a good teamwork with some already experienced edubloggers sharing their ideas and progression with us.