In order to fill out the form I had to type with one finger at the rate of 1 character per second.
To be fair, Silverlight 1.1 does NOT ship with any standard UI elements. But I'd think that it'll be heckuvalot easier to write libraries (UI or otherwise) for Silverlight than Flash (don't know Flash programming that well, though)
AS3 closes the gap here, as does Flex. It's now a moot point when developing