You can test any IR remote with your iPhone just look at the IR part of your remote with the camera on your iPhone and you can see the lights if the remote works.
I have a video here
I know alot of people know about this already but im sure there are some people that don't, this also works with any digital camera or webcam. So yes you can use your isight
I have a video here
I know alot of people know about this already but im sure there are some people that don't, this also works with any digital camera or webcam. So yes you can use your isight