This story of a new feature being added to TiVos in Australia sounds awesome: ordering pizza from the couch. Yeah, on first read it totally reinforces the whole "couch potato" aspect of watching TV and eating unhealthy food, but every once in a while a nice pizza hits the spot. I'd love to see it come to the US.
I've ordered a pizza online before (Domino's, because it was the only option) mostly just to try it out (it was easy and nice to get exactly what I wanted without having to sit on the phone for several minutes) and I imagine the experience in a TiVo environment could be pretty quick and easy once you store your address and phone number.
Wow: looks like someone floated this idea on a blog in 2004