Silverlight 3 has been released here are some of the released links:
Silverlight 3 Runtime
http://www.microsoft.com/silverlight/resources/install.aspx
Blend 3 with Sketchflow
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=92e1db7a-5d36-449b-8c6b-d25f078f3609
SDK
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=2050e580-f1d5-4040-bb09-e6185591b6b5
VS 2008 Tools
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=9442b0f2-7465-417a-88f3-5e7b5409e9dd
.NET RIA Services (July 2009)
Still waiting on these:
- Silverlight Control Toolkit (DO NOT use the March 2009 preview with Silverlight 3 RTW, it doesn’t work)
- Bing Enterprise Map Control for Silverlight (currently in CTP)
- ADO.NET Data Services (currently 1.5 CTP)
- Prism Update (saw some blog post MVVM templates they were adding to the framework)
- Visual Studio 2010 Beta 1/2 tools for Silverlight 3 RTW
- Other (Silverlight Mobile maybe (?), XBOX Developer Add-Ons etc.)
Installation notes for developers:
You need to uninstall EVERYTHING Silverlight developer related to get it to work: Silverligh 3 SDK, Visual Studio 2008 Tools, Blend 3 Beta. Otherwise you will get a message saying your developer tools are out of date.
Installation notes for casual users:
Your users will automatically be upgraded to Silverlight 3 (if they have the auto update selected, which is the default).They can always upgrade manually.
Source : http://silverlighthack.com/post/2009/07/09/Silverlight-3-Relase-and-Download-Links.aspx