I also have the cheap pelican selector posted above. while it is a good deal for the price IMO, here's a couple of things you might want to consider.
-build quality feels very cheap, especially the buttons that switch the components.
-although it advertises 4 inputs(or in gamestop's case, 5), it's more like 3 and a half. you have 3 true inputs(with component, composite, s-video and ethernet inputs) and one input with only s-video and composite hidden on the front of the unit.
-I'm not sure if it has the fidelity to display an HD signal without at least some loss in quality.
I still love mine, although I only use it as an s-video/ethernet switch(no high-def stuff), just keep these things in mind.