Check out this electric creation called the LA Skatebike. It has handlebars, brakes, and a front wheel like a bike, but in place of the seat, pedals, and back wheel is a skateboard. It's like a scooter, but it has a touch of skateboard added to the mix.
The LA Skatebike has a 250 watt motor, making it capable of going around 13 mph.
If you run out of juice, or want to get a bit of exercise, you can also propel yourself by kicking, like you would on a scooter.
Link: LA Skatebike
US $84.99
