Miguel de Icaza has written a progress report on their Mono port of Silverlight, called Moonlight.
It's a pretty impressive account of what they have accomplished in the first 21 days of developing Moonlight. It's interesting to see what a team with deep knowledge of a domain can produce in an intense session of hacking.
It will be especially interesting to see what core Silverlight features the Mono team can develop by the time Silverlight 1.1 releases, so we can target our Silverlight applications to the common denominator.
Also, I wonder which will release first: Silverlight 1.1 or Moonlight 1.1?
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.