Yeah, I was going to say Slingcatcher but WOW. I didn't know they were so rare. I got one for free for being a beta tester, I'm keeping it now... I think it was discontinued because of the buyout from Echostar/Dish.

One option is what Peter said, output your computer to a TV. Another, which I can't guarantee will work, is to use an iPhone or iPad w/ video out and run the Slingplayer app. If the app allows video out, then you can pump that video out to a TV.