It was great to see ITV use Silverlight to provide their live channel streaming and catch-up TV services for the Mac audience. I think it's really interesting that they chose to reach out to a Mac audience using latest Microsoft technology and it's a great demonstration of the cross-platform capabilities of Silverlight.

Silverlight is also used if you're running Firefox on your PC too.

You can see reports at Macworld and there's also at Automated Home.