Just got off a conference call with Scott Guthrie at Microsoft where he announced the release of Silverlight 2 today. It will be available tomorrow; 14th of October 2008 alonside a version of Expression Studio tomorrow that will have support for Silverlight 2 as well.
Unfortunately I wasn't able to type all the information they announced, as I was on my bike and for obvious reasons wasn't able to take notes. 🙂
The download links aren't available yet, so pay attention to the official Silverlight.net site.