I'm not specifically familliar with software/hardware for it, but I've seen them in the past. Try searching on IRDA.
Ok, so my laptop in my car has an ir port, I'm assuming its both an emitter, and a receiver. I was thinking of using it for i/o, but would need some sort of ir receiver/emitter box that would translate into analog lines. I know that I could use it for input, but would like to be able to use it for output as well. Anybody know of software that would allow me to use the port anyways?