Thanks, I should have just read the Documentation. This Is the push I needed to get started. I was Cartographic Aid with the Census Bureau for the 1970s census, so I may have have indirect responsibility for some of the Tiger errors :-) Now that I have the time, equipment & some GIS skills I correct as much as I can.
I seem to have lost my smart phone yesterday, but still have several Garmin GPSs + a Maemo PDA (n800 w/external 32ch receiver). For now retracing Bing ariel on the worst Tiger errors should keep me busy.