The idea for a spoon you can eat originated in Hyderabad, India with the inventor, Narayana Peesapaty. It's a pretty sturdy spoon with just a few ingredients that he hopes will be able to compete with disposable plastic spoons.
Originally only available in India, it looks like this spoon might be coming to American markets.
If you're wondering how it can stand up to hot liquids and still biodegrade a few days later the answer is that the water does have some affect on it. A dry spoon in an airtight container will stay good for up to two years but, according to the FAQ on the Bakey's website, if you leave it in liquid for over 10 minutes it will get soggy.