If you haven’t seen it yet, there has been created a forum category for game development on the silverlight.net site.
http://silverlight.net/forums/52.aspx
In the same forum category there has been created a forum dedicated to the upcoming site, http://silverarcade.com which will launch in the end of March 2009.
This is a really great step in the right direction for Silverlight as a gaming platform. When Microsoft creates a forum like this on the official silverlight site, it tells me that they see silverlight as a serious platform for internet games in the future, which is really great in my ears.
– Enjoy!