I'm pretty new to the Arduino stuff, but I'm wondering if it is possible to connect the TouchShield (e.g. that one: www.liquidware.com/shop/show/TS/TouchShield) with cable (so that you have your TouchShield seperated from your Arduino - but still connected via cables)
Just bundle some of these M/F jumper wires together, or solder up a couple of ribbon cables to male headers on one end and female headers on the other.
It depends on how far you want to separate the shield from the Arduino, I guess.