About month ago the Beta version was released, and now ASP.NET MVC team is announcing to day that ASP.NET MVC 2 RC is out there and that release candidate is ready to be downloaded and play around with.
Mainly it is focused in bug fixing, improving current features, and performance tuning and you can as usual read the release notes for more details. Mainly the focus in Beta and RC releases are in the validation, validation localization, HTML.RenderAction and HTML.Action, you will find more details in this post.
This version is for Visual Studio 2008 and should come in the RTM of Visual studio 2010 which should come out sometime in next March.