Potato-powered web server
d116.com
d116.com
It is not powered by the potato!!!
It is powered by the metal leads stuck into the potato!
The metal oxidizes (burns) and releases energy. It would work just as well with salt water. The potato is simply an ion bridge (i.e. it connects the two metals together via a conductive path, and encourages/enables them to oxidize).
If you had a time machine to 11 years ago you could tell him to just soak a napkin in salt water and put the leads in that and avoid rotten potatoes.
Sad thing, that the actually potato powered computer, is now offline. I could see this roots/fruits/vegetables-powered Internet, grow on me(No pun intended...Ok, just a bit :-P).
edit: could this work in any way with trees instead of potatoes? I bet they would last a lot longer