I have recently finished a paper on the usability issues between Flash and Silverlight. Please take the time to read the paper Flash Vs Silverlight: A Usabilty Evaluation and please post your replies.

How would you have carried out the experiments differently?
What do you think worked well? or not?
How can this paper be carried on to include other issues?

I look forward to reading all of your comments, Thank you!
James Mallorie (Bsc Hons)

Abstract
This project explores specific usability issues relating to the Adobe Flash® Player and the Microsoft® Silverlight™ Player in the adoption of Rich Internet Applications. A critical usability research study was undertaken to formulate an evaluation framework. The findings of which, formed the basis of several structured experiments. The Adobe Flash Player and the Microsoft Silverlight Player were systematically tested against the framework, resulting in a thorough and comparative evaluation of current and future usability issues.

Flash vs Silverlight