I think having something like a talk/Q&A show where people can ask questions over Facebook or Twitter and you show just that message on the screen as they talk about it is really cool. But almost always when I see Facebook and Twitter on TV it's just a feed of random people's comments about what's going on.

I can't honestly say I've ever seen one of the latter that hasn't annoyed the crap out of me and just distracted from the show I wanted to watch... It'd be nice if the main video and the overlay could be delivered separately so you could have the option to turn it off (like you can turn off annotations on YouTube video). Hopefully when all our video content comes over the internet and not broadcast.