I've posted the 3rd sample/tutorial in my on-going WPF/E excursion, this one is on animating straight lines left-to-right and top-to-bottom. I posted it because the first time I tried it, I had some interesting results, and it's much easier to grab code that works than to flounder:
http://www.wynapse.com/WPFE/Tutor/Basic_WPFE_Straight_Line_Animation.aspx
This page also allows animation restarts to watch it as you read the xaml code that I also display.
Good web links found today:
A new Google group for WPF/E headed up by Michael Schwartz:
wpf-everywhere@googlegroups.com
And an interesting site for web developers to share useful tools:
http://www.thepeoplestoolbox.com/web_designers/