Update: I installed a 16 tooth rear sprocket and can now peddle with power at 18+ mph.
My new ride, a Giant LA Free Lite. This bike has an electric motor. You still have to pedal it, but the motor provides strong acceleration from rest, great hill climbing ability and allows you to cruise with little effort at up to 17 mph. You can go faster than that, but without the electric assist. It has a 5 speed SRAM shifting system. The range is advertised at approximately 28 miles, but can be much longer than that with judicious use of the power and use of the "economy" setting.
I added a rack, fenders, lights, bar ends (not pictured) and I changed the tires. I also mounted a water bottle cage on the handlebars, since the bike did not come with braze-ons for a cage.
I'll use the Lite (light for electric bikes but still heavy) for commuting to the train station, but it's great fun for any sort of ride. It doesn't matter how much stuff (e.g a camera and lenses or a laptop) you bring along, because the motor can handle the additional weight. Purists might not like this bike--until they try it.
Get your e-bike at Electric Bikes Northwest+California; they stock the best brands and give excellent service: http://www.electricvehiclesnw.com/