Here you go...
http://members.aol.com/erospace/diesel.htm
Seems like a good idea,though. I'll wait 'till more popular.
Diesel at larger airports may be available; but for a single engine Piper or Cessna, where it's greatest strength is that you can get in and out of any mom and pop airport, diesel or Jet A fuel is few and far between at those airports.
I'm also not sure what happens to injectors with both fuels,separately or mixed.