Windows 7 Release Candidate is out and available for public download under customer preview program. Not much difference in Windows 7 beta and Windows 7 RC in terms of features however Windows 7 RC has many bug fixes and set of beautiful wallpapers designed specifically for Windows 7 RC.
Another big change in Windows 7 RC from Windows Vista is Icons. If you want to use Windows 7 icons to create themes & styles for Windows 7 then here is Icon set extracted from Windows 7 RC by one of deviantart user.
Windows 7 RC icon pack contains over 2000 icons!!!
Download Windows 7 RC Icons