A search for eprints posted at the ClinMed NetPrints website (at http://clinmed.netprints.org/home.dtl) yielded a total of 13 eprints posted between December 13, 1999 and March 21, 2000.
I posted one of them. The abstract (at: http://clinmed.netprints.org/cgi/content/abstract/2000010010) is entitled: "Peer review in a post-eprints world". In the article, I assumed that rejection rates of the kind experienced as a result of conventional peer review shouldn't be a problem for eprints. This assumption appears to be incorrect for NetPrints. If the code numbers assigned to NetPrints are assigned sequentially, then it appears that at least 32 eprints were submitted to the ClinMed NetPrints website between December 13, 1999 and March 21, 2000. Of these, only 13 have been posted. Thus, the acceptance rate appears to be about 40%. It seems that, so far, the rejection rates for ClinMed NetPrints have been quite high. It's also noteworthy that the number of 'rapid responses' to the posted NetPrints seems to have been very low. Not what I would have predicted. Jim Till Joint Centre for Bioethics University of Toronto
