Silverlight 4 went RTW (Release to Web) today – you can find it on the silverlight.net site.

What was not widely discussed is the fact that the Silverlight 4 Tools for Visual Studio 2010 release is officially an Release Candidate, not yet officially an RTW quite yet, though may be declared one if no major issues are found.

Scott Guthrie detailed this in the Channel 9 Live broadcast following the Silverlight 4 launch event.  Go to the Silverlight 4 launch video and select the Channel 9 Live On Demand option, then skip ahead to 01:34:30 where he talks about these 3 things.