This has been around for a few years, but if you have not seen it yet, check it out.

It is a free software program for your PC or Mac that allows you to "emulate" (play) old arcade games from the 80's and 90's. It actually lets you run the original game exactly as it was written!

A great site for this is Arcade at Home. You can locate the latest Mame code there and then you just need to hunt the web and locate "rom" files. These are the software code that makes the original games work. You can play virtually anything: PacMan, Ms Pacman, Missile Command, Centipede, DigDug, and even my latest favorite... Robotron. I'll write about that later. :) They even have extremely rare and old games that you may have never seen... there are THOUSANDS of games this program can run.

People who really get into it have converted old arcade cabinets into Mame machines. Remove the old hardware of the cabinet and hide a computer inside.. then hook up the joysticks to the computer (they sell interfaces to do this). You can find people selling these on EBay, just search for "mame" or "mame arcade".