If you have multiple HDMI sources and you don’t have enough HDMI inputs on your TV, then Key Digital Systems has something for you. If you need your HDMI sources scaled to fit your display, then Key Digital Systems has the same thing for you. The first is an especially common scenario because many HDTVs have only one HDMI input.

It’s their HDMI 4×1 Switcher, and it includes a video processor. It even works with HDCP protected sources, so you should be able to use it with anything that puts out an HDMI signal, including upcoming HD-DVD and Blu-ray players.

Note: if you have DVI-D/HDCP inputs/outputs, then you should be able to use this switcher if you use adapters.

Link: Widescreen Review - Key Digital® Introduces Innovative HDMI 4×1 Digital Switcher
Link: Key Digital - 4 to 1 HDMI Switcher & Processor