I used to subscribe to this great little ... well, it's not actually a magazine, a little booklet might be a better description. It's called A - B (or something like that). I subscribed to this when I was deciding which folding bike to buy.
I let my subscription lapse, but they have a web site with some useful information. If you want pricing info for folding bikes or just some general info, take a look here:
A to B is a magazine that's more British based than anything else. I never subscribed to the magazine but I believe in the philosophy of using folding bikes with trains, trams and buses.
Unfortunately, most people don't like folding bikes and would rather have root canal than be seen on a Brompton. It makes much more sense in England where the transit system of trains is excellant. Not so in the U.S.
A folding bike would make excellant sense in a situation like that.