Autodesk continues to develop Revit MEP and 2012 looks like it has many improvements. See just a few below.
And this is huge:
Systems themselves have been enhanced with the ability to create and name custom duct and piping system types, and easily assign properties such as color, lineweight and line patterns to objects within a specific system, allowing them to be visually identified. Previously, these properties could only be assigned using filters and were therefore view-specific; now, these properties can be assigned at a global level and can be seen in all views.
Entire article here: http://www.aecbytes.com/feature/2011/AutodeskAECTechDay2011.html
Craig R. Thomas, NCARB
Associate, Senior CAD/BIM Manager