Is there a way to share a 27" Cinema Display w/Thunderbolt with both my MBA and a PC. Basically I still rely on a PC for my desktop needs, but would like to use my MBA connected to a larger monitor at times. While I have a cheap Samsung TN monitor now, I'd like something nicer, and the Cinema Display looks great, but only if I can multi-purpose it. Assuming the above problem can be solved I'd also probably then be in the market for shareable Bluetooth keyboard/mouse to use with both systems. TIA for any help that can be provided to a Mac newbie.