Looks like Silverlight 3 is rolled-out: Runtime, SDK and documentation are already available for download. See the Client / Server libs?

Runtime:
http://go.microsoft.com/fwlink/?linkid=143433

Silverlight 3 Tools for Visual Studio 2008 SP1:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=11dc7151-dbd6-4e39-878f-5081863cbb5d

SDK:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=d09b6ecf-9a45-4d99-b752-2a330a937bc4!

Documentation:
 http://msdn.microsoft.com/en-us/library/cc838158(vs.96).aspx.

Blend 3 Preview:
http://www.microsoft.com/expression/blendpreview

 Best regards,
 - tobias

This could be just a little reminder on Silverlight 3 (you know MIX 09 yadda, yadda, yadda) but perhaps it can be a little bit more for you.

Check out any download in Microsofts Download Center for Silverlight 2 and you will see something like the following on the "Thank You" page which appears after the download itself.

Clicking on this link brings you to a "coming soon" page. Might this be true for everybody? Perhaps you can just adjust you user-agent string to get access? I don't know. If you have access to MS' intranet, it looks like you can download SL3 Tools from here (found via this one).

Sorry, just a litte teaser And look out for LOB functionality in SL3.

Best regards,
 - tobias