Windows 7 SP1 RC1 is now available, for the hardy souls amongst you http://www.theregister.co.uk/2010/10/29/windows_service_pack/
I wonder how many bugs remain to be squished.
Got an abacus? ;D
If you've been keeping your Windows 7 up-to-date then SP1 won't do that much, as usual.
The most important update I've seen recently is one that prevents disk corruption on disks greater than 2TB, so the data hungry among you may want to check that out.