Lookes like its a bot hitting the yahoo network. These are some of the sites that traffic is coming from. Notice they are all the same. The bot will will click on a couple of links to mask its self. Hope this helps others.
[edited by: engine at 9:47 am (utc) on Aug. 31, 2009] [edit reason] No specific sites, thanks. See WebmasterWorld TOS [/edit]