Today, we announced that the Exchange Server 2010 Release Candidate is feature complete and available for download here.  Updated online documentation for this release can be found at http://technet.microsoft.com/en-us/library/bb124558(EXCHG.149).aspx.

Make sure your computer and infrastructure meet the Exchange 2010 System Requirements, install the Exchange 2010 Prerequisites, and install the Exchange 2010 RC today!

Enjoy the Release Candidate!