Mainstream biking, here in the US? According to Wired News: Saddle Up Yer Velomobile, it's possible and happening. This recumbant is even getting some actual cyclists to trade in the regular commuter bike. Though it still looks like something out of a 1950s space movie, it is a practical method to get people out of cars. And, with writing a letter to your congressman about better bike access in your town, it might soon become the most desirable way to travel.