The final release of Windows XP Mode available via the Microsoft Download Center on October 22nd. OEMs will be able to offer Windows XP Mode on their PCs based on their manufacturing schedules.
For more information on Windows XP Mode, including feature highlights and quotes from some of our partners, I recommend reading this blog post.
Windows XP Mode is designed to provide small business and mid-sized businesses running Windows 7 Professional (or higher) the ability to run Windows XP productivity applications that may not be natively compatible with Windows 7. We expect many Windows XP applications to be compatible Windows 7 however Windows XP Mode is meant to serve as an added safety net so small and mid-sized businesses can migrate and run Windows 7 without any road blocks. Windows 7 Professional is designed to meet the needs of small and mid-sized businesses.