Just downloaded and installed standalone SP1 on my Windows 7 Enterprise x64 laptop, no problems and this install only took about 10 minutes.. a lot better then Vista which is about 30 minutes on a good day..
SP1 for Windows 7 and Server 2008 R2 KB976932 is still not showing up on my WSUS servers but according to some online source I saw that MS are working on this and it will get automatically pushed once ready. No release date yet.