New crowdsourced and open source project - a complete Revit Category Guide

Having repeatedly asked and searched for a detailed, up-to-date and accurate Category Guide for Revit to no avail, I have decided to start one as a simple shared Google spreadsheet.

The purpose of this is to capture all of the unique properties of each Category, so they can be quickly viewed and understood by Revit users at all levels.

The document can be viewed at:
https://docs.google.com/spreadsheet/ccc?key=0AldGdRkpk2bedElRNDZGTFdHLUZPQktqbXktY0pWU0E&usp=sharing

I have selectively invited a few top Revit users to contribute.  Please let me know if you want to help out with editing the document.