Try Stevia (Score 1)

Apparently in Japan, many foods (including Diet Coke) are sweetened with stevia instead of sugar or aspartame. Stevia is a natural herbal sweetener which is something like 300x sweeter than sugar. Unfortunately, as this article says (http://www.cbc.ca/consumers/market/files/food/ste via/index.html), it is illegal in North America as a food additive because the FDA and Health Canada have not yet approved it as such. More information about stevia can be found at http://www.stevia.net/