I don’t own a TV right now. But I do own an eyeTV.
(Disclaimer: According to the Anglicans, Lent is suspended on Sundays. Just so you know.)
Elgato Systmes makes the eyeTV 500, a high definition tuner that plugs into you Mac computer. It can be used as a personal video recorder for archiving your favorite shows and also for later editing.
I hooked it up today for the first time to check out the NCAA round two games. Check out this picture on my new Dell widescreen monitor: