Hi. This question was asked and answered last year, but the answer was "no word yet" and the version the answer pertained to was the beta.
How about now? Can you download the Flash player onto your Xbox so that you can view, say, Lynda.com videos on an Xbox? When I go to the Flash download page in the browser on my Xbox 360, the page renders blank, as if it's being sanitized by the Xbox.
(Last year's answer: http://forums.xbox.com/themes/groups/generic/forums/thread.aspx?ForumID=7&ForumThreadID=323070&GroupKeys=xbox_forums/xbox_support/)