Microsoft offering 90-day free trial of Windows 7 Enterprise RTM for download
You're in luck. Microsoft has made a 90-day trial download of Windows 7 Enterprise available. You can download the ISO image now.
This is the RTM version, not the RC. What you're downloading is the same OS that will be available for purchase in a couple of months.
Both the 32 and 64-bit versions are available, and you don't have to be a member of TechNet, MSDN, the Partner Program, or have a Software Assurance agreement.
[via Windows Team Blog]