Brian has a nice write up of GameTap, you can of course always roll your own too… “GameTap is Turner Broadcasting’s subscription-based gaming on demand service. The list of games is pretty impressive, but what really jumps out at me is the platforms represented: Dreamcast, Sega Master System, Intellivision, Genesis, Atari 2600, Arcade games, and more. It looks like they’ll have a decent selection of modern games, but retro games currently dominate the list”... Link.