Deploy a Report Builder 3.0/VS 2010 Report on SSRS 2008

Visual Studio 2010 and Report Builder 3.0 RDL reports use a new schema that is not supported by SQL Server 2008 Reporting Services. They are designed to work only with SSRS 2008 R2. Currently there is no way to publish a VS2010 Report on SQL Server 2008 without some modifications to the RDL code.

Executing Powershell Commands against Exchange 2007 and Exchange 2010

The System.Management.Automation assembly allows the exeuction of Powershell commands against Exchange server.
Although, it would seem that the same code would be able to run for both of the versions of Exchange Server, two different codebases are required. The reason for this is that Exchange 2007 (SP1) supports only local Powershell, and Exchange 2010 uses remote Powershell.