Christmas has come early this year.

Gu announced at PDC that an early beta of Silverlight 4 is now available. Tim Heuer has posted the relevant links on his blog: http://timheuer.com/blog/archive/2009/11/18/whats-new-in-silverlight-4-complete-guide-new-features.aspx .

Keep in mind that Blend 4 and Silverlight 4 are currently preview, so there is no go-live license as there currently is for .NET 4.