The Grayzone's blog

Change Opacity of Border on MouseOver
How to use a XAML Behaviour<T> class to change the opacity of a UIElements border on mouseover/mouseout.
Custom URL Protocol in Windows CE
How to add a custom URL protocol (similar to mailto: or ftp:) to a Windows CE application, including registy entries to alter and code samples.
Returning String[] from RIA Domain Service
How to return a string array from a RIA Domain Service controller, avoiding the error: Type 'String' is not a valid entity type.
Detecting Connection in Blackberry
A quick check method to verify whether Blackberry device has an active connection and is charging as this can avoid unnecessary connection attempts and a bad user experience.
Sharp-shooter for Silverlight - Supplying Credentials in Service
I'm unsure how popular the Silverlight Sharpshooter report viewer is but this post details how to specify credentials within MsReportServiceRemote implementation.