Paul,

You might dig up some back issues of the various aviation magazines.
There have been a number of stories of folks who commute to work in
airplanes, most all are in the southwestern potion of the U.S. (read
arid areas), and a lot of them shared rides, so there were two - four
people in the airplane each way, keeping the cost down. Types tended
to be Cessna 172s or 182s although there were some Cherokees. For
commuting distance, the airplane speed doesn't matter a lot as a very
fast airplane only shaves a few minutes off the speed of a much slower
airplane.

Friend of mine is commuting one day a week in a Cessna 150 that is IFR
equipped. Hour and ten minute flight versus two hour forty minute
drive. He has an autogas STC, so the cost isn't all that bad. If
there are thunderstorms or ice, he drives.

All the best,
Rick