Autodesk has released update #1 for AutoCAD MEP 2009 release date July 25th, 2008.
Here are the links below
AutoCAD Revit MEP Suite 2009 Product Update #1 32-bit only
AutoCAD MEP 2009 Product Update #1 32-bit
AutoCAD MEP 2009 Product Update #1 64-bit
Many improvements have been made with this update, I recommend reading the Readme file.
Don't forget to turn on communication center if you have not done so already. That way you will always stay up to date.
