I think it is possibly through hardware to connect the two together. I think the software just doesn't exist. I am currently hooked up to 23 inch ACD. It would be nice to have some extra screen real estate for itunes, adium, mail, misc. without having to buy another monitor. Im sure this is going to be impossible in todays world... but it shouldnt be! Unless of course the DVI port on MBP is only for output (as well as the MP port) even then software should exist to add a 'virtual space' on another monitor similar to how screen sharing works in leopard. (even if the screen was alittle pixelated) I think this would be a nice feature and useful. Anyone with me at all on this or is it just late and tired...?