"Radio Shack also used to carry a switch that responded to IR. It did not come with a remote but was designed to learn from any remote you want to use. This should also work from HS."
I have this box. It had 5 rear panel and one front panel Svideo / Toslink / Composite / audio R / audio L connections and two output sets of same.
Learns IR commands that HS can send. I just grabbed an IR file for a device I knew I would never own, and used that to program the Input choices.
Works good, but it provides no messenging of it's current selected input. So, if someone manually changes it, or the IR command isn't heard by the device, then Macro scripting can get hosed up logic.
It was $150 but I don't believe they are selling it anymore. It was "high end" from a Radio Shack perspective and I don't think they sold many.
I will be looking for a serial controllable switcher soon, so this one will be on the market when I find one.