I have set up a mailinglist for cockpit builders, esp. those who use (or want to use) flightgear as their simulator.
From the list description: "This list is dedicated to homebuilt hardware for the FlightGear simulator and others. Electronics and mechanics, as well as the software the ties the hardware to the simulator are primary topics. Discussions about glass cockpit software and other software-based aircraft instruments are also welcome."
To subscribe to sim-hardware, send an empty email to [email protected] or go to http://lists.varxec.net/cgi-bin/mailman/listinfo/sim-hardware