The Silverlight.net community site is now live on www.silverlight.net.
If you're new to the technology you can get some great tasters in the 'learn' section -- http://silverlight.net/learn/learnvideos.aspx
There's a lot of information of subjects as diverse as using Silverlight with PHP and JAVA (as well as ASP.NET), getting started with Blend, internationalizing Silverlight, using Silverlight with ink and much more.
This is just the beginning, we have a lot more on the way! Enjoy...