Google is currently working with Dish Network, Bloomberg TV, and NBC Universal – all that you receive with your MAG 254 subscription, to allow Adwords users to create TV ads on several different TV networks.
This service is currently only available for national targeting, and only to people with an Adwords account, as it is part of that interface. But you can see that Google is working hard to make your ads available everywhere consumers look: desktop computers, mobile phones and now TV.