Broadband Access Via Digital TV Signal?

SlashChick asks: "My mother saw a TV commercial the other night about a new form of broadband access which works via a digital TV signal. You place a digital TV antenna on your desk and it receives broadband data at up to 768K/sec. Uploading is accomplished via a dial-up modem. The company mentioned on the TV spot is Web Hopper, which is available in Cincinnati, OH. Are any Slashdot readers familiar with this service or other similar ones? Is this a good option for those who still can't get DSL or a cable modem?"