So I was tipped off to a guy who is bicycling the lower 48 states and aiming to do it in 48 days.
That's the basic route, from a local newspaper article. He is from Ohio actually - near Dayton.
His website is http://www.go48in48.com/ but it's not up and running just yet.
It is about 8100 miles, so he has to do 165-170 miles a day, which should be quite daunting!!!