Roku late Sunday gave its Internet media players a boost in the form of the Channel Store. Now considered an open platform, the avenue lets content producers of any scale implement their own video services. The service also brings major content providers such as Facebook's photo service, Flickr, Mediafly, Pandora, Revision3 and TWiT; relative newcomers like blip.tv, FrameChannel, Motionbox and MobileTribe are also onboard.