Well, I never went any further with the wiki! Hopefully I will get some wiki experience in BaW07, where I have volunteered to co-moderate Week 3 (blogweek), so I am now part of the planning team (although I have so far done nada besides lurk).
However, I am going to try and install Blogchat on this blog. Wish me luck. :-)
My first attempt got me nowhere. This is more complicated than I thought.