Microsoft Dynamics CRM 4.0 SDK Update - v4.0.6 is out
The new version of SDK is out. You can get it from here : http://www.microsoft.com/downloads/details.aspx?FamilyID=82e632a7-faf9-41e0-8ec1-a2662aae9dfb&displaylang=en.
Only difference in the description of this kit is, it doesn't mention that Report Writers Guide will be released with next update so you can hope that this one already includes one.