LCD & CPU Modules For Game Cockpit Panels?

Milo_Mindbender writes "I'm working on designing a simulator cockpit, similar to the one shown here (about half way down the page) that I helped design while Chief Engineer at Virtual World Entertainment, in the mid 90's, for playing high-end multiplayer simulation games. I need a device to use for multiple small 'instrument panel' screens as seen in the photos. It needs to be off-the-shelf, panel mountable, color, under $400 in quantity, have USB to connect to the cockpit's main PC and have a CPU so it can generate or update simple graphics locally. The perfect thing would be a PDA minus batteries, case and with the ability to poll 8 or so buttons. Support for Embedded Linux would be nice too. Any ideas?"