Great to see the community publishing new stuff for the community.
Kevin Dockx, the Sivlerlight guru as they call him over at RealDolmen, has recently published the source code, documentation and even an online working sample of drag & drop controls for Silverlight 2.
Project Description (Codeplex)
Silverlight Drag Drop Manager allows you to easily implement drag and drop behaviour in your Silverlight projects by providing a DragSource & DropTarget control, which act as a content container and can contain any SL user control. Highly configurable.
Great work Kevin!