Asus M2NPV-VM flashing works generally but there is small problem with integrated ethernet MAC address. My ethernet MAC address changed from 00:17:31:83:xx:xx to 00:04:0B:80:80:80. According to other report [1] looks like this problem relates to other Asus models too.
[1] http://www.flashrom.org/pipermail/flashrom/2009-November/000879.html
regards Antti