WPF Learnings - Animated Screen Glint Effect

To learn some WPF I wrote this full screen editor called Writespace, which is now open source on Codeplex. I wanted to add some bling to the editor when it was loaded up, so I created a simple animated "screen glint" effect which is totally useless but looks kind of nice (IMHO). Basically it's a semi-transparent gradient, in a rectangle, on a canvas, the size of the screen, which animates over the screen from left to right.

I had a question about the best way to do this over at Stackoverflow, so check it out if you want some sample code which produces the test-output you see above (which is in mid-animation :)