Yesterday, Microsoft released a 90-day trial version of Windows 7 Enterprise for IT professionals.
The 32-bit or 64-bit DVD image can be downloaded by going to the following URL:
http://technet.microsoft.com/en-us/evalcenter/cc442495.aspx
It might be a worthwhile download if you are curious if your existing applications will run on the new operating system. The basic hardware requirements are a 1 GHz or faster CPU, 1 GB of RAM and 16 GB of disk space. As noted on the Microsoft TechNet web site, Windows 7 Enterprise will not be available through retail channels.