Well, it is here. Exchange 2010 has been released, and there is a 120-day trial available at Microsoft. Of course, if you have a technet subscription, you won’t need the trial.

http://www.microsoft.com/exchange/2010/en/us/default.aspx

The trial is the final version (14.00.0639.021), released 11/09/09, while the Virtual HDD version is still the RC dated 10/12/09.

http://go.microsoft.com/fwlink/?LinkId=168905