Sorry I haven't updated in a while. Nothing has really happened; I was working on the frame blueprint but ran into an issue between the handlebar pivot (shortened head tube) and the seat bracket. They want to be in the same place. I'm going to have to notch the seat bracket, I think. I got pretty distracted by mountain bikes' charms, but still would like to finish this project.
20GT:
If I were smart, I'd build one of these instead:
The Recumbent Bicycle and Human Powered Vehicle Information Center
I'll post the other blueprint(s) when I finish them, but I am also really short, so unless you're 5'2" you would have to do some modifications to make it work.