I just read about a very new application compatibility slash desktop virtualisation solution that will be available as a free download addition for Windows 7 Professional, Enterprise and Ultimate. The solution is called Windows XP Mode. It will be a version of XP Service Pack 3 that runs in a virtualisation solution similar to Virtual PC. This means that you have a way to run XP applications on Windows 7 just in case they won’t run on Windows 7 natively, even with the shims available from the application compatibility toolkit.