you can get an s-video adaptor for the mac , and use that at the top rear , where the buttons are
since the res is nowhere near that of an hdtv , s-video should be more than good enough
i had a mini linked up to a sony crt and it looked ok
personally , i'd think about using an lcd panel or hdtv as a monitor as the res ( 640 x 480 or thereabouts ) just won't be much use in the real world , certainly not for web browsing or using os-x efficiently