[mattmaroon]

IE is still 70% of traffic. So, if you write something in Silverlight, and IE maintains that, you're going to work in 70% + however many non-IE clients have Silverlight or are willing to get it.

That will be most everyone. People will do just about anything you ask them to. The prevalence of phishing has proven that. They'll put their online banking creds into any site that has bankofamerica somewhere in the domain name. They'll buy Viagra from an anonymous email through a Costa Rican pharmacy. They'll most certainly click the button that says "Install Silverlight from Microsoft to watch the video".