You’ve likely already heard of Cablevision’s Optimum app for the iPad. The software garnered a lot of attention when it first launched, allowing Cablevision customers to stream their entire channel lineups to their tablets.

A few days ago, the company released the popular cable-client for the iPhone and iPod touch, with the addition of a major feature. Not only can you watch live TV on your iDevice, you can now control the content on the big screen as well…

“As a Cablevision subscriber, you can view live TV with this app while in your home behind your Optimum modem. You can also playback your On Demand rentals on your iPhone/iPod touch or use the device as a remote control, and it’s as easy as ever to search, browse, and record TV shows to your DVR.”

The app requires a Cablevision internet connection to work, but the company is reportedly offering TV-only customers with a free internet-blocked router to utilize the streaming video feature. If you happen to be a customer of the U.S.-based cable provider, this one sounds like a winner. Grab the new and improved Optimum app here.

Any Cablevision customers try the new app yet?