I guess that's the thing, how do you expose useful knowledge and conversation in a way that's discoverable. For myself, I find the biggest draw back with the forum, is when using the search (which is kind of the starting point for a problem) the results that are returned are often very old/irrelevant. But as you say, it's also rich in knowledge! I suppose the good thing, is at least these aren't new problems, just look at stack exchange and the various things they've been through.