Thanks for the Flex link! I think it would be a clever decision on Nokia's part to give devs an easy way of building standalone Flash apps for the tablets - should draw the game developer crowd to the platform without them having to bother with a new development environment.

As for Silverlight - I attended a MS developer meeting recently, and one guest speaker from an ad agency was full of praise for Silverlight due to its apparently more flexible (no pun intended) approach to objects and their manipulation. However, I doubt that the tablets are on the MS radar yet.