The site MicrobiologyBytes has comprehensive information on retroviruses, including murine leukemia virus, which is of the genus gammaretrovirus and the family retroviridae (Just found that out). http://www.microbiologybytes.com/virology/Retroviruses.html Most of the stuff is way beyond me, but others may find it useful. There are videos and a "Pretend to be a Retrovirus!" game at the bottom of the page. I found it fun but a little weird. The Google news feed for retrovirus at the bottom of the page has the New York Times article with a picture of Andrea Whittemore. Word is getting out.