I remember when Nutra-Sweet first came out back in the 80s we tried it out and it gave my mom really severe seizures that lasted for days. So Aspartame was banned from our house from that point on.
This doesn't surprise me at all. Sugar is only bad for you in excess, this stuff is bad for you no matter how much of it you consume.
I hear people talking about Splenda, but that stuff was discovered accidentally while researchers were trying to come up with a new kind of anti-freeze for cars. Not exactly something I want to be putting in my coffee every morning (unless it's really cold outside I guess