There is a real shortage of reference material and training material for AutoCAD MEP or really for all the Autodesk MEP offerings.

Here is some information that you may find useful.

First, did you know that you can request from your reseller to have a copy in book form of the

AutoCAD MEP Tutorials and the AutoCAD MEP User Guide? It’s so much easier to follow along with the tutorial than having to flip between screens or share screens. Ask about it.

There should be more whitepapers available for such a robust program. (hint, hint) Some of the whitepapers on the Autodesk site are old and simply have been updated to have terminology for the latest release and name change.

The system requirements can be expected to change soon with the 2009 products releasing.

Some of the best information can be found from the Autodesk University (AU) website. If you attended or are a subscription customer, you will have access to this information on sessions.

Here are some of the ones that I found best.
ME214-1 AutoCAD MEP: Power Tips for Templates by David Butts
ME204-1 A Simple Plan for Implementing AutoCAD MEP by Todd M. Shackelford
ME218-2 Workflows for Harnessing the Power of AutoCAD MEP by Peter Basso Associates, Inc.
ME300-1 New Tips and Tricks for Piping in AutoCAD MEP by Gregg Stanley
ME114-2 Levraging AutoCAD MEP for Calculation and Quantity Take-offs by Dustin Tiemeyer
ME210-2 Easily Create Ingelligent Equipment in AutoCAD MEP by T.J. Meehan
ME218-3L Creating Block-Based Multiview Parts with Mass Elements in AutoCAD MEP by Eric Bogenschutz

Besides the blog link to Todd Shackelford listed above, there are only a few other blogs related to AutoCAD MEP.
AutoCAD MEP by Scott Brisk
Space and Elevation aimed at AutoCAD MEP fabrication with Eastcoast CAD/CAM software