Extended Silverlight Surface demo - Great Silverlight demo showing photos and videos in the way Microsoft Surface does. This new version extends the previous demo by adding support for Video items and item captions.
Integrating MVC with Silverlight - Bryant Likes shows in two parts blog how to integrate Silverlight into a MVC application and builds a nice looking Silverlight menu bar. Part 2 focuses more on the Silverlight part of the sample. Source code is included in the blog so you can take a look at it.
Silverlight toolset - Mark Bosley summarizes the main tools he uses for Silverlight development. Except Visual Studio 2008 and Expression Blend that we all use, Mark points out Reflector, SilverlightDefaultStyleBrowser and BeyondCompare. I would add Silverlight Spy to this list ;)