Sign Language App for Roku

My company, iSigner, has a product that can translate a closed caption file into sign language on the fly. We would like to discuss bringing our technology to the Roku, but we're not sure who to talk to. This would not be a Channel or Game... it would be a layer like closed captions.

You can see it in action here: http://www.isigner.com/

Any help would be appreciated.

Steve