Kensington has the solution for those of you who want to run multiple displays – potentially several of them.
The Kensington Dual Display Adapter plugs into your USB port and gives a DVI output (or VGA with adapter) for connecting a common monitor. The cool thing is that up to six adapters can be used on a single computer (provided you can dig up the USB ports), making that wall of screens you've had your heart on more accessible. The Kensington Dual Display Adapter retails for $199.99.
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