If you're 5'9" or less in height, I have a fabulous solution for you.
Betst Bikes is producing the Aerlite B with slightly different features (see RideTHISbike.com for exact details). To transition from the current stock quickly, they've offered brand new bikes with the old specs at just $279 including shipping. To get the price, you need to order them via RideTHISbike.com. Here's the link with the special offer:
http://ridethisbike.com/2007/01/great-folding-bike-deal-save-140.html
By the way, the Kent Ultralite magnesium folding bike for $169 is also a great bargain and is perfect for short commutes. Components are not Shimano and it doesn't have fenders but it's a totally acceptable bike.
Respectfully,
Larry Lagarde
RideTHISbike.com
Urging bicycling for recreation, commuting, health and a better future.