I think whilst clearly transparency is a good thing, there is a point here. The same way people are discouraged from pm'ing forum staff all the time, you wouldn't want a situation where, just because someone had put their hand up and said, I don't know, they know a bit about ATI drivers, that all of a sudden they are being hounded! That said, they're volunteering with their eyes open I guess, so maybe.
I was wondering if a kinder and more targeted approach might be a option, I suppose, either in the Forum, or in Launchpad, where users were asked if they would like to volunteer, by subscribing to tags, They could subscribe to as many tags as they felt they could help with, and we could filter unanswered posts into a daily/2 daily/weekly (whatever) email. Sort of like if you subscribe to a forum (rather than a thread) now, and receive daily notifications.
This is just a thought, and I haven't really thought it through yet, but the point is what we need to do, is get the posts to the people who can answer them directly, in a way that isn't going to be too much of a burden on those volunteering their time. ie by better targeting,
Further to that, I would give some members of the team the ability to 're-tag' posts that go unanswered, after say, 2 hours. The tag scheme is great, but suffers because it assumes the poster has a clue what they are asking, and in fairness to some, they often don't.
Finally, and one I am less sure of, an unanswered tag that automatically gets put on a post that goes unanswered after a couple hours. So for example if one wanted to productively kill twenty minutes, just search for 'unanswered,fglrx' and you would get, well, probably a days work!