Well we know that today is the official release day for Win 7. There is a buzz that today Sp2 for ConfigMgr 2007 (SCCM) will also be release. Since it is still only 6AM over in Redmond, I can assume it won't be pushed to the web for a few more hours. Once it goes live I will add the link to this page.
ConfigMgr SP2
http://www.microsoft.com/downloads/details.aspx?familyid=3318741A-C038-4AB1-852A-E9C13F8A8140&displaylang=en