As the WPC is happening in DC, we know there will be a set of announcement to hit our way, and some have already started flowing.
Yes, today itself has had a share of them.
Service Pack 1 Beta for Windows 7 and Windows Server 2008 R2 are announced as available, keep in mind the Beta part of the name.
Make good on downloading and reading the documentation set http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=61924cea-83fe-46e9-96d8-027ae59ddc11
And then if you want to try it, download the SP1 Beta bits too.
http://technet.microsoft.com/en-ca/evalcenter/ff183870.aspx
Again, keep in mind we are talking about Beta bits, so try them on a non-production environment.