I've been playing with the RTLSDR radios and have been wanting to build them into a computer. My toughbook was perfect for this because it has tons of space inside for the various expansion bays that I'm not using. The media pocket (where the cd drive would go if you had one, I just use a usb cd drive on the rare occasion I need to use a cd), pcmcia, and expresscard slots are all next to each other and leave a lot of space for addons. I took the case off a small 4 port USB hub and installed it in the case with a RTLSDR dongle and a funcube dongle, although you could use two (or more) RTLSDRs if you wanted.
I then cut the plug off the usb cable going into the hub and soldered it onto the pins for one of the usb plugs on the back. This means I lose one of the usb ports, if you wanted to be cleaner I'm sure there's an internally used usb port that you could tap into that goes to the docking connector.
From the RTLSDR the antenna connector goes to a SMA connector mounted on the door. I used a flange mount SMA connector because I was having trouble with the more common type that just mount with a nut.