Here is a picture of my Dahon folding bike. It is a Piccolo, I bought it this spring and I use it for running errands or when we go somewhere on a trip, it folds up very small and fits nicely in the trunk of my Pontiac Sunfire. Since this photo was taken I removed the folding flat pedals and added Shimano SPD pedals, as well as a sealed cartridge bottom bracket. I find that this bike rides very well for having 16" wheels, if I close my eyes I hardly know that it isn't a full size bike. For more information check out:
www.dahon.com they also have a very good message board that is invaluble for people considering a folding bike. These bikes are great for commuting too, if you want to ride to work and then ride the bus home if weather turns bad, these are the ticket.