Looking to cut cable bills? Online TV could help

Amazon's launch of its free on-demand video service last week adds yet another option to the growing market of online programming. Access to the retailer's free video library is only available to select customers and still fairly limited. But the new service underscores the movement away from the living room TV set to computer screens and even mobile devices. For some households, online programming could be a way to cut down on expensive cable packages that can easily top $150 a month. The features and prices you'll find online vary greatly, however, so you'll want to go over them carefully. The market is still scattered, with the same programming often available from multiple sources. But here's a look at what you get with three well-known providers.