I like BeyondTV for standard Definition TV, but not so much for HD television mapping the QAM channels is a real chore. There are whole threads on the Snapstream forum detailing these issues, but Snapsteam has announced that development for the BeyondTV product is pretty much dead (other than the experimental betas.) I also own a TIVO, and the QAM mapping was all done for me, I just had to turn off the channels I wasn't getting. The other thing about TIVO is that you can use a cable card with it, which, from reading the Snapstream forums, hasn't been done with BeyondTV.

Ericsson did this with their line of phones in the early 2000's. You could snap on an MP3 player, keyboard, and FM radio, or a bluetooth chip. Now however, except for the keyboard and in some models, the FM radio, everything has been integrated into the phone.