1. “For Windows 7, SP1 includes only minor updates, among which are previous updates that are already delivered through Windows Update.”
2. “SP1 for Windows 7 will, however, deliver an updated Remote Desktop client that takes advantage of RemoteFX introduced in the server-side with SP1 for Windows Server 2008 R2.”

No official release timeline is available as yet, but the rumor mill sez it will probably hit in late October or early November, 2010. I, for one, will be very interested to learn more about the enhanced RDP client capabilities that will come when Windows 7 clients work with Windows Server 2008 R2 hosts with SP1 also installed. Maybe Microsoft is trying to coat-tail a new server release on a seemingly successful desktop release for once? I don’t see any betas for this SP release up on MSDN just yet, but please count on me to keep you posted when more tangible signs of what lies ahead appear there (or elsewhere).