Introducing the Icade - genius!
IT WOULD be remiss of me not to mention the ipad, with it being such a big talking point at the moment.
On the American site think.geek.com there is an excellent little invention designed to turn the ipad into a retro style arcade machine. It's labelled the icade and quite frankly it's a stroke of genius in my opinion.
Retro titles like Donkey Kong and Space Invaders can be played as they were intended using classic arcade controls in an excellent wooden games cabinet. It's about as clever and cool as you are going to get!