A friend has a similar issue with a Sony (I think) receiver. He switches between Dreamcast, PS2 and N64, depending on what he feels like doing. He got a switch box, hooked up everything to the back and does it that way. If its convenient, you could do something similar and locate it away from your equipment, so it doesn't clutter everything up. Another tip was to get 2 optical cables and a connector, mount the connector and cable connected to the receiver somewhere easy to access. That way, when it comes time to disconnect the PS2, you only pull out of the connector, not the back of the receiver. I'm not sure if any receiver on the market has an optical input on the front, but it could be a great idea.

Not a true solution, but maybe a good (cheap) compromise.

S.