Yes, you can emulate NES in Linux. Tuxnes, fceu, fwnes, ines, darcnes and others. And I do use ZSNES in Linux. Too bad it's limited to the x86 architecture...
As for the Playstation, I would like to try it, but I haven't got any games or roms for it.
Edit: By the way, I meant to say that a Wintel was worth little more than a game comsole.
[ June 09, 2003: Message edited by: Laukev7 ]