Apologies if this has already been posted but it seems theres a new version of the SP1 beta available to the public via windows update. There doesnt seem to be a standalone download (that I can find) apparently its had quite a few new bugfixes incorporated into it. Ill give it a try later and let you guys know how it is 
http://www.microsoft.com/downloads/details.aspx?familyid=529d992a-d69e-4c73-9213-7a7f3852c0ca&displaylang=en&tm

http://www.microsoft.com/downloads/details.aspx?familyid=529d992a-d69e-4c73-9213-7a7f3852c0ca&displaylang=en&tm