Comcast has announced its intention to offer 3,000 hours of on-demand, streaming video content to the iPad. Details are scarce (in fact, that sentence just about wraps the story up), but we do know that the service will include both TV shows, live news and movies. How or when (other than "later this year") the ball will get rolling is still unknown.
Comcast explained a bit more about the Play Now feature that will be a part of its