I had thought that I read somewhere that EOS Utility could handle both cameras at once through LiveView but I was wrong.
EOS Utility can auto-download from multiple cameras. So I was left with the issue of still having to trigger two DSLR cameras simultaneously. (I'm using two Canon Rebel XS/1000D) In doing a little more research I came upon this website: http://www.doc-diy.net/photo/eos_wired_remote/
It supplies a diagram for the wiring for a wired remote trigger. With that in mind I bought a male to male stereo cord with 3.5mm jacks (McMaster 8317T13). I was unable to find a cord with 2.5mm jacks, but I bought two 2.5mm to 3.5mm adapters. I also got a 6 terminal momentary rocker switch (McMaster 7246K19). I had planned it so that when you push the switch up the camera focuses and when you push it down it takes a picture. This specific cord has three colors; red, yellow and white. Red corresponds to focus, yellow to ground and white to shutter. I figured this out by plugging the cable into the camera and then just touching wires and seeing what happened (it didn't blow up thank god). i didn't have a wiring diagram for the switch and kind of guessed that ground would be the middle tab. I wired it up and it works!
Here is a close up of the switch. I noticed that the switch works opposite of the how the wires are connected. So when I move the switch up to white, it actually focuses. I don't know why this is, but also don't care because it works.
I'll be using this switch to run both cameras and mounting it somewhere handy on the scanner. I'm not sure where yet and still have to make a mount.