Use some visual distinction on community wiki post display in various SO listings (on user page and on the main listings), for example: different color, [CW] displayed after the title or auto-add community-wiki tag to it?
I definitely feel that a community wiki question should be different from a regular question. The latter is usually direct and looking for 1 answer. The former is usually not worth the effort to read all the answers to before throwing in something.
Personally I don't care if the question looks different in the list view, but would appreciate if they all came with a free 6th tag of <community-wiki>, that doesn't have to show anywhere (though that would be odd) but can be filtered against so that it's not in your list view.
I thought that was what the subjective tag was for...
Only kidding...I like this idea. Maybe give it a light gray tint on the background so we know it's wiki. We probably don't have to add yet another tag to it.