Autopatch with serial server.
Here is the meat of the setup. I made the Autopatch available on the home network using a serial server (Vlinx), which concerts ethernet to serial control. This way all touchscreens/PCs can use the matrix switcher. It also cuts down on running cables as no serial cables are required.
Link to send via email/instant messenger:
http://public.fotki.com/benjh1028/mce-home-automation/dscn1199.html
Code for a Fotki Journal:
[photo id=kfkkrskbfqgfrwxdgkrwkgrwbfd type=vi style=1 align=no link=photo]