All Mac notebooks have TV output, NTSC and PAL. And all recent ones support HDTV resolutions/modes over DVI. If you don't have a Mac notebook and yours doesn't have TV output capability, then you'll have to find something that takes VGA signal and converts to NTSC. They exist, but I don't know any brand/product information.

It's possible to have TV-out capability wired up through a DVI or VGA port if there's no dedicated SVIDEO/Composite ports. You'd have to check the documentation for your machine to know. Then you'd use an adapter from the notebook vendor. Our latest Mac cards have analog TV lines wired to their DVI ports for instance.

I just finished watching Equilibrium on my PowerBook connected to my TV.

Bruno