Great discussion, I will be ordering one from Newell as well (they are currently backordered as of 7/23/09). Check out the picture on this link from the Bob Dickman Les Schwab website:
http://www.dickmantires.com/air_pressure/air_pressure.html
They sell the same unit (for about double the cost) packaged in a nice Pelican case. I will probably set mine up in a similar manner. They do have a few extra pieces though. There is a mechanism on the inlet air side, it doesn't look like a moisture trap. Anybody know what that is? On the outlet side it looks like they have added either a high pressure blow-off valve or maybe it is just a simple spring loaded valve to vent the air line between the unit and the tire after use. Any ideas?