Well, if you want a nice Dahon Electric I am working on a mid-drive Mu-N360. I need to work out the next battery arrangement. I've already made an electric Mu P8 with good results. The N360 is ideal as the NuVinci CVT (continuously variable transmission) is really great with E-Bikes.
My shop is Nomadic, Inc in Boulder.
Here is a pic of the P8.