Microsoft Windows 7 Professional is now available in MSDN Academic Alliance. Next week Windows 7 will be available through ELMS download for student distribution.
Windows 7 Client Retail Professional Edition (English) is included for student distribution in both the x86 and x64 variety. For lab installs, Windows 7 (x86 and x64) Enterprise Edition (English) is included with the volume license keys.
The specific features included in Professional and Enterprise editions are described at http://www.microsoft.com/windows/windows-7/compare-editions/default.aspx. Note that the Windows 7 Enterprise has the same features as Windows 7 Ultimate edition. The features that Windows 7 Enterprise (and Windows 7 Ultimate) has in addition to those in windows Professional are support for BitLocker Drive Encryption, Multilingual User Interface and UNIX application-support.
There is NO supported upgrade path from either Windows 7 Beta or Release Candidate (RC) - to Windows 7 RTM (Release to Manufacture). For additional information, see Windows 7 Upgrade Paths.
Useful Support Resources/Links: