Thanks for sharing this, Tim--very interesting! Haven't looked at it in depth, but seems good idea on the surface. Though in a way, it just makes more explicit what most of us can and are already doing, which is to deposit pre-typset versions (where publishers allow) in an institutional repository. This just makes it more of a norm to do that unless someone opts out on a per-article basis. Usually, as at my institution, it's just voluntary on the part of faculty members and researchers, and many might not even know it's available or that it's a good idea. So from that perspective, seems like a good thing!
There may be downsides I'm not seeing, though...
Christina