Also from personal experience, I do know that Aspartame causes me extreme confusion, stress, and general mayhem the few times I have tried to use it and this was years before I found out it was just not me. And last, just about a week ago, I heard a doctor on a local talk radio list Aspartame as the 2nd most deadly food we could possibly ingest.
With the advent of olestra (synthetic fat) that the FDA says will definitely make you sick if you eat too much, I see no problem with them approving a sweetener that can kill you. Just my $0.02