I was looking for something like this myself and the closest I could find was this to-be-released product at $400
http://www.gefen.com/gefentv/gtvproduct.jsp?prod_id=5277

I can't vouch for it though, and if you read the thread on the forum it doesn't exactly inspire confidence:
http://forum.gefen.com/topic.asp?TOPIC_ID=2578

For the price they're asking, I think I'd opt for a low-end hdmi receiver with pre-amp outputs to use purely as an "hdmi switch" instead, at least you'd have 3 or 4 hdmi inputs.

-John