Is there a DVI-in port on the iMac, essentially letting you use it as an external monitor for another machine (say, the Macbook mentioned in my .sig)? I have a PC plus monitor that I want to replace, possibly with an iMac. But I use this monitor as an external monitor for the Macbook occasionally. If I were to get an iMac, I would sell this monitor (24", donchaknow). I doubt the wife would let me keep it around just for kicks. If there is no DVI-in, then is there a video card upgrade that would allow that setup?