that is really funny about your avatar...sounds like something that would happen to me...
I forgot to mention that I physically mounted the IPAC using the PCB Mounting Feet I got from Happ Controls. I was ordering stuff from them anyway, and just added those to the list...I'm sure you could find something similar for less $ elsewhere, especially since I think they have a minimun order cost.
Also, since I knew I was going to have multiple control panels (so far there is a Street Fighter / Neo Geo one, a Star Wars yoke, and a Tron control panel) I put a 25-pin dsub connector mounted right underneath the control panel. These wires go back to the IPAC, and I can just plug my control panel into the 25pin. So far, I haven't had any problems w/ noise or back connections.