If you don't want to switch your comcast box (or if you potentially want to quit cable): some Tivos will record over the air (OTA) signals, newer ones won't record OTA but they will play web content (like Hulu, Netflix, Amazon, etc). In either case you'll still need pay for the Tivo subscription to make them go.

Did you look at this page? http://www.tivo.com/products/tivo-wa...ugh/index.html