There are a bunch of lists.
Here are a few off the top of my head though...
NHL.tv (National Hockey League )
MLB.tv (Major League Baseball)
UFC.tv (Ultimate Fighting Championship)
All 3 of these Major Sports Leagues use the .tv domain for their services of offering live events/streaming/full season viewing subscription packages.
FYI.tv uses the dot tv - they do not own the dot com to promote their network and all of their shows.
BMW.tv - uses the dot tv for all of their bmw videos.
i.tv - i.TV is the maker of the most downloaded
TV guide app for iPhone and iPad
Comedy.tv - owned by Byron Allen/Entertainment Studios. Not just a network but the show is also called "comedy.tv"
Concrete.tv - I sold this domain to this awesome Company! One of the baddest ass tv sites online and guess what they are all about - yep. Concrete!
There are many more.