I get some wacky looks when I'm cruising on the 3G Stepper. A cross between a bike and an elliptical machine, the 3G Stepper is propelled forward when you push down on the (two) steps while standing. The 3G has no seat and that makes for a full-body workout. Supposedly, the standing position is considered better for your posture than sitting on a normal-seated bike.
Cruising speed is about 15 mph and riding it isn't as awkward as you'd think. Five models are available, ready to provide exercise and transportation for the whole family. Is this really cycling, though? Does it matter? At $649, you've got other things to worry about.