It basically a wiki within a basic social network…each page can have text, images, links, comments, and keywords (tags).
Search for terms or browse the keyword cloud or use the navigation box…you also have feeds for recent comments, active pages, new pages, and updated pages.
And of course it is a wiki, so there is communal editing.
The home page says it’s part blog, but I don’t see any blog like feature.
The social network feature is very simple, basically users get their own space, includes a profile, contributions, comments, and watchlist.
Here is a random example of a wiki (it doesn’t link to the user profile, but it does link to users who have updated pages)…I suppose these wikis technically don’t have owners, they are set free…hmmm, not sure.
All about social lists
[ADDED 10/01/06: Wikia is similar]