I have looked through the forum a bit, you have some very interesting bikes and concepts here.
I live in BC Canada, lots of mountains and lakes. Riding a bike is very difficult here and with bad knees even more so. Last year I bought an electric bike and is this bike a blast and quick too. I really enjoy biking again. I get many people asking about my bike, especially when I fold it and place it beside my table. With gas at almost $6 a gallon and going up daily I know I will get a lot more use of my bike this year. I will post a picture of my bike when I figure out that area.
Good Riding to All