Generally speaking, if you want really fast internet, your best choice has been 1 Gigabit per second (Gbps). There have been a handful of places, such as Chattanooga, Tenn., with faster internet. But ...

Comcast is such a tease. The cable internet provider set up an 11-mile gigabit network that can download 23 episodes of 30 Rock in less than two minutes. Exciting? You betcha. Coming soon to your home ...