If you have a need for a second display which is not directly wired to your machine you have several choices, from the Cthulu card Ryan reviewed to Intel's WiDi to the upcoming product from the HSA.  There is another choice available which comes as an external device, the Diamond VideoStream WPCTVPRO uses a DisplayLink DL-165 chip to stream video and audio to a second monitor that has a receiver attached.  Bjorn3D tried it out and found it more than capable of sending a 1080p signal in almost all cases although the broadcast range is relatively short which could impact your decision.  Check out the full details here.

"The Diamond VideoStream WPCTVPRO is a new device to help you setup a dual-monitor without a long wire connected to your PC. Using DisplayLink technology, the device communicates to your secondary monitor (TV for example) wirelessly through Ultra Wide Band (UWB). How does it perform? Does it live up to its promise? Let’s find out."

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