Looks like Microsoft is set approve the use of Sp1 for 2008 R2 and Win7. There is a hotfix that needs to be installed.
http://support.microsoft.com/kb/2489044/en-us?sd=rss&spid=12769
Hopefully no one jumped the gun and installed Sp1 in their enviroment before it was certified by the ConfigMgr group. As a general rule when something new comes out you should look to MS for their 45 to 90 day rule of testing. Once they says it works then you can install/upgrade. This goes for SQL versions.
Running this hotfix on your site systems will add the capabilities you desire. There were problems with this site earlier in the day so keep trying if you have a problem. Many people are dowloading it I bet
