Yes, it's already on the downloadcenter!
Here is the link: http://www.microsoft.com/silverlight/resources/installationfiles.aspx?v=2.0
The SDK is available here:
http://www.microsoft.com/downloads/details.aspx?familyid=4e03409a-77f3-413f-b108-1243c243c4fe&displaylang;=en&tm;
And the sourcce of the controls are available here:
http://www.microsoft.com/downloads/details.aspx?familyid=ea93dd89-3af2-4acb-9cf4-bfe01b3f02d4&displaylang;=en&tm;
And finally (for now), the documentation is available here: http://www.microsoft.com/downloads/details.aspx?familyid=1840cab5-196c-4264-b55d-562242a72625&displaylang;=en&tm;
More info later after the keynote!
Snowball.be - The blog of Gill Cleeren