Here is the link to the blog post
http://xbmc.org/topfs2/2010/07/05/weekly-report-6/
Here are some videos, http://www.youtube.com/watch?v=cO0vzNGz8vc dirty
regions on buttons and imaged, Confluence fully dirty region rendered
(on my workstation) http://www.youtube.com/watch?v=KjhjFTUjthk