Now this I can't wait to see - Autodesk has released Autodesk Fabrication, a set of tools that works with Revit MEP models. You start with a Revit model including pipe, duct, etc. Export the model to a .RIF file, and import it into FABmep.
Fabrication lets you break the model down into modular systems, spools, etc. I noticed it contains libraries for pipe from Victaulic for fittings - but I'm real curious to see if the covered any others, like Charlotte or ACIPCO ductile iron...if they did, I'm really keen on looking into this.
Check it out at www.autodesk.com, and then search for Autodesk Fabrication - a free trial is available.
thanks - David B.