i dont myself but a guy i knew did. he made a really cool synthesiser. i think the electronics werent all that arcade related but he used arcade controls. if i talk to him anytime soon ill see if he has pics or info...
edit: that site is cool. actually gives me some great ideas for arcade machines (",)
edit edit: cool. triple 5 timers! i havent played with them since trade school (",). i think ill bookmark that site...
edit edit edit: and STYLOPHONE keyboards! you can't get more retro electronic than that!