The first study by Auvert et al. viz. HIV/AIDS and circumcision was roundly criticized for its overstated conclusions. A perhaps not widely circulated critique appeared in the same online journal that published the Auvert study. It is an enlightening and sobering read that brings the hype back down to Earth. It’s provided in pdf format for download here.
THANK YOU again to George Hill for providing the pdf file.
[Edit 2016: Michel Garenne wrote a more comprehensive paper on this topic in 2008: Long-term population effect of male circumcision in generalised HIV epidemics in sub-Saharan Africa – Michel Garenne 2008.]