Hi, Silverlight 1.0 is now released as RTM, you cand download them from their official web site
http://www.silverlight.net , microsoft have also updated the 1.1 beta version with the last stable rendering engine. Microsoft have also made an official partnership with the mono team for making a better version of Moonlight by making available to the mono team their internal testing suite for silverlight and the binary of the codecs used for playing video, take a look at
http://www.mono-project.com/