Aereo began a year ago in New York City and is now expanding into 22 markets. It is going after the growing contingent of TV “cord-cutters” who would rather watch on-demand content online than pay for cable or satellite packages. Aereo charges a minimum of $8 a month for a subscription.

via Internet TV Startup Aereo Could Help Cord-Cutting Catch On | MIT Technology Review.

The interesting thing about this idea is that they somehow figured out how to associate a single antenna to each subscriber.   Content delivery networks, which this seems to be, are difficult to implement on a large scale.