[Via Dave Campbell - a blog you should read if you're into Silverlight.]

Just launched is the beta of a great (Silverlight-based) site by Celso Gomes with some simple to use tutorials for Blend & Silverlight:

http://www.nibblestutorials.net/

Currently, there are some good tutorials for creating animations and buttons, but Blend/WPF tutorials (and I'm sure other Silverlight ones) should be coming soon!

Check out Celso's blog as well:

http://nibbles.wordpress.com/

-Chris