just came across this while i browsing seems like ATI have something big planned for the Q3-Q4 of 2010, maybe this is that refresh of 5870 that is buzzing around the fourms or the all new architecture that some people say that coming late 2010 or early 2011.
http://www.itembargain.com/forum/index.php?topic=72.0
http://www.itembargain.com/forum/index.php?topic=72.0