Once again for those that missed the subtle message in the title, the BETA of SP1 is now available for you to test - whilst Win7 users won't see much of a difference, those in the Enterprise environment that have been waiting for the new Hyper-V and Remote Desktop Services features will have something to play with.
http://www.microsoft.com/windowsserv...en/us/sp1.aspx
No ETA for the RTW at present.
I wouldn't recommend applying it to a production machine (test in a VM instead), service packs are usually not "feature packs" and there haven't been any major performance issues with Win7/W2K8R2 to address with a service pack.