Link (Thanks, Eric!)
This IKEA dinner table is expandable; it slides apart and more leaves can be inserted. When closed, it functions as a "dinner table" (that is, a place to pile my crap (temporarily relocated to the floor nearby)). It can be opened to reveal a sit-down MAME cabinet.
The display is a 15" LCD I got on sale. The controls are all from Happ Controls, and they're wired to an Ultimarc I-PAC . The surfaces are lasercut acrylic. Carpentry of varying quality holds everything to the existing table frame.
You can play any game on the MAME cabinet; some cooperate better than others on a sit-down style cabinet. I play Ms. Pacman exclusively, which hasn't yet translated into a better score.