"One of the world’s largest manufacturers of computer components and hardware – Asustek Computer – has unveiled what it calls XG Station, an external adapter that boosts 3D graphics performance on notebooks as well as adds Dolby audio to mobile computers. Practically, the XG Station is the foundation for world’s first external graphics card.
Asus’ XG Station is an adaptor with PCI Express x16 slot for graphics cards and 5.1-channel audio logic inside which connects to notebooks using Express Card interface as well as USB 2.0. The device also comes with a screen that can display certain important parameters, such as system master volume, graphics chip’s clock-speed and temperature, frames per second information, fan speed and so on."
Sounds cool, but it's an external device so a notebook isn't exactly as portable with one of these.
The XG Station is currently scheduled to be released at the beginning of Q2 2007.