Whereas in the UK broadcasters have rushed into internet TV, in the US the opposite seems to be true.
Take ESPN as an example; they first of all made their ESPN360 service available to cable subscribers who took their service (OK - Sky have done the same in the UK, I know), now they're making it more widely available - but only to viewers in .ac or .mil (ie students and soldiers) domains.
The rights landscape, as well as the competitive landscape, is very different in the US from Europe and elsewhere, but it still amazes me how slow major US broadcasters have been at moving on internet TV. But, if I recall, publishers were equally as slow when the internet came along. These large media organisations get it right in the end, but only by spending vast amounts of money buying their way into knowledge.
Fortune favours the brave, and large media organisations are anything but brave.