I came to Bloomingpedia in March of 2006 after finding a link to it from the Bloomington article on Wikipedia. I've been a resident of Bloomington for about 15 years now, and thoroughly enjoy this community. I think this project is a great idea.
Why the name Opus? To anyone that knows the Bloom County comic strip, the association should be obvious. If you're not such a person, reading the links will help.
I think wikis are a fantastic improvement in the way we collaboratively work together on information resources. Certainly they have their limitations, but so do any other such platforms.