The Folding Bike

Three companies are already interested in cranking out thousands of copies of this compact cycle, and it might not even be exorbitantly expensive, perhaps less than $700.

Source: http://www.treehugger.com/files/2009/08/contortionist-folding-bike-video-dominic-hargreaves-royal-college-of-art-student.php?dcitc=th_rss

Future Bike

This amazing bike concept is part exercise machine, part electric scooter, and will even help to pay your fare while providing a seat for the bus ride home.

Source: http://martenwallgren.blogspot.com/2009/06/winner-seymourpowell-award-for.html

Human-powered monorail

New Zealand's Scweeb monorail is probably a healthier (if a little cramped) alternative to the bike.

Source: http://www.shweeb.com/Shweeb/business_opps_IDL=1_IDT=2824_ID=16127_.html

The Electric Bike

There are an estimated 1 million electric two-wheelers on Shanghai's streets. The China Bicycle Association, a government-chartered industry group in Beijing, estimates that last year manufacturers sold 7.5 million electric bikes nationwide—nearly double the sales in 2003—and they are likely to ship more than 10 million this year. Shouldn't we be using them in the US also?

Source