I know we all were waiting for the Exchange 2010 SP1 to be available for download. Do not wait anymore, here you go. Download the exchange server 2010 SP1 and enjoy the new enhancements.
Download your copy of Exchange 2010 SP1 here
Exchange 2010 SP1 software can be used to update an existing Exchange 2010 installation and to perform new installation.
The SP1 software is supported on Windows 7 Professional 64-bit; Windows Server 2008; Windows Server 2008 Enterprise; Windows Server 2008 R2 Enterprise; Windows Server 2008 R2 Standard; Windows Vista 64-bit Editions Service Pack 1.
To know features included in Exchange 2010 SP1, read here.