This is not new but somehow not as known as it should be. Project Rosetta is about enabling Flash Designers to quickly grasp the fundamentals of going from Flash to Silverlight and understanding what’s different and what’s the same. It was developed by Rick Barraza of Cynergy Systems, a firm that is arguably an expert in both platforms.
There’s also so great links to a wonderful whitepaper on designer and developer workflow. Learn more at The New Iteration.