By utilizing my home network, existing systems / hardware, and an HDHomeRun Prime (with a CableCARD), I get ALL of the subscribed channels to ALL 5 HDTVs in the house. It saves around $50/mo by virtually eliminating all rental fees. Plus I get to watch (and record) on MORE devices than a single STB.
More info here:
http://www.silicondust.com/products/hdhomerun/prime/