Then there would seem to be an opportunity there to automate some of that work. Imagine an algorithm that could give an estimate of the impact factor of an open source project (sort of like the impact factor of an academic journal) and of a particular developer's contributions. You'd end up with a score kind of like karma at HN or reddit, which could be used by lazy HR departments to make the first cut. It could probably be gamed, but somebody's going to scrutinize you more closely for the second cut so gaming it might not be advantageous.