This is a great little free app from Logitech that I was sent a link to the other day.
I suspect I'm not alone in using our pc's to watch movies, whether this is in your bedroom or in your living room. I often connect my laptop upto my HDTV in my living room to watch stuff I've downloaded. This app essentially turns you iphone into a track pad mouse which works just like a mouse connected to your pc/laptop (it even has a small drop down keyboard) so that you don't have to get up and fart around pausing or changing files.
All you do is install it on your pc and iphone and it works by connecting through your router. Worked 100% fine for me last night and you can get it here
http://www.logitech.com/index.cfm/494/6 ... =downloads