Cameron, thanks for a most illuminating talk at the University of Cape Town: I think you especially opened people's minds to a new way of publishing, and of assessing impact.Â

Author payment charges, by the way, are possibly the single biggest block to publishing Open Access articles: if as often happens in SA the journals refuse to waive charges because "we are too developed", you will find folk will default to a no-charge journal - because the charge (often >USD1000) can represent a significant fraction of teh research grant that funded the study being published.

And on the other side, articles from Africa and other developing regions get far better exposure in Open Access journals, and articles from developed country authors are more easily read by their "southern" counterparts.

So - yes to Open Access, no to author charges!!