Here is a real cheese dick schematic I threw together in Photoshop.
http://www.jasoncohenitservices.com/patch_bay.jpg
Its too big to embed without making the forum look like shit.
Basically its a 24 input patch bay, and you can see how I have it configured. I actually have a perma DI box and Remp box setup as well routed into the patch bay that goes to an input on my interface. This allows me to do quick reamp setups.
none of this is actually built or implemented as I am still building the patch bay, but once its completed I will post pics.