While discussing the problems we have been having with one of our cell phones, and how we would dispose of the old one, my wife came up with a great idea.
"Why don't they make edible phones? When you are done with it, you simply eat it!"
The more I thought about it, the more it made sense. It's not an impossible goal, although incredibly difficult. There are organic materials out there that do just about everything required - substrates, masking, semi-conductors, phosphorescents, etc. etc.
It might take a while to get the average cell phone to under several pounds of weight, and leaving it in the sun might be a problem, but then there are other benefits: no need to worry about all that personal data on your PDA - a little concentrated hydrochloric in your GI tract would take care of it permanently.
The pathetically obvious advertising campaign for LG's "Chocolate" series telephones (1, 2) would certainly make more sense.