Any way to hook it up to a projector and use it to control a presentation there? Speaking of which, I think I remember an app for iPhone or Android that would

Any way to hook it up to a projector and use it to control a presentation there? Speaking of which, I think I remember an app for iPhone or Android that would let you do presentations like that in a slightly roundabout way. You would upload your presentation to a webapp and then to give it, point a browser to some URL. Then you could use your phone to control the slideshow. Anyone else remember what I'm talking about? I'm fairly certain I saw this and am not making it up.