How to Submit a Bug/Feature Request for Silverlight - Scott Barnes explains the steps you should follow to submit a bug or feature request to the Silverlight Team. Seems there is a bit of confusion in the whole process.
Creating Smooth Tile Transitions using Opacity Masks - Part 3 of the Mike Snow's Terrain tutorial series.
How to Detect Alt, Shift, Control, Windows and Apple keys with Left Mouse Down in Silverlight - Mike Snow's Tip of the Day #31 - the long title says what is all about