I'm wanting to put a GPS in and basically out of sight, also about at least six to eight switches to control a bunch of different thing. Problem, would like to see pic's of what other people have done for this. I know of the ash tray trick, but I'm sure other people have come up with different places to sort of hide these thing.
Some car makes hide the GPS in a slide that pops up out of the dash. I think Audi and Nissan are a couple. You could make a hinged mount, fastened above the windshield, that you could mount one and flip it up or down like a visor. On my Sebring, I just mounted my GPS on the clear plastic cluster cover over the speedo. I dont need to see the speedo, and if I do, the GPS has a more accurate one. No one looking to steal a GPS thinks of looking at the cluster...you can only see it from the seat. Switches are a lot easier. You can hide them about anywhere you want. Along the bottom of the front edge of the dash is out of sight. You could also hide smaller ones right in the trim of the A pillar....you may have to trim away some structure sheet metal a bit. Same with just mounting them, with some backing, in the headliner board itself.