Look up a thing called telekinesis in GoogleCode, haven’t been able to get it to work other than over my local network, oh and you have to have a Mac and videos and files you want to look at/watch on your computer too. Essentially it just creates a server you access in Safari and you can do things like stream music and video, take a picture with your camera, it has a VNC tool on it so you can mess with your computer from somewhere else and of course a better remote that controls more functions than Apple’s Remote, well at least since the last time I’ve used it.

Sorry I don’t know anything for Windows users.