I would've watched the presentation but you hadn't yet convinced me why I should download Silverlight. 

"Unsafe JavaScript attempt to access frame with URL http://analytics.live.com/Sync.html?V=3486 from frame with URL http://channel9.msdn.com/posts/Charles/IE-8-Dev-Tools-An-Introduction-with-John-Hrvatin/. Domains, protocols and ports must match."


Yeah. Good luck with IE8.  Make use of those Dev Tools while you're at it.