I'll be saving up for my first Laptop with a RatBrain 1GB Neuron powered CPU and 1/2 Kilo of Mild Chedder acting as the internal power source. Probably not a good idea to connect a Mouse though !
http://www.pocket-lint.co.uk/news/news.phtml/16878/17902/Rats-brain-cells-power-robot.phtml
http://www.pocket-lint.co.uk/news/news.phtml/16878/17902/Rats-brain-cells-power-robot.phtml