I have a Graphite 400 mhz slot-loading iMac. It has optional Airport. I know I can get an Airport card w/adapter and connect wireless to Airport base station. What I would like to know is whether there is built-in infrared wireless capability that would enable it to converse wirelessly with another Mac or iPod Touch within a few feet away. I think I read something about this several years ago when I bought it, but never pursued it until now. Any info would be appreciated. Thanks.