Dish Network announced Sling TV. The service will provide access to 10 cable networks online for 20 bucks/month. Here is the list of networks: ESPN and ESPN2, Disney Channel, ABC Family, Food Network, HGTV, Travel Channel, TNT, CNN, TBS, Cartoon Network and Adult Swim. This sounds like it could be pretty awesome. The one major caveat is that only one device can stream at a time.
No release date yet, but I imagine it will be soon.