>>1
Cyclamate isn't in anything anymore, at least in the US; the FDA banned it well over 30 years ago. You still see saccharin in things that need to be heat-stable (like medicines and fountain syrup), but it's already been replaced in some cases with ace-k or Splenda.
As for aspartame toxicity, most of the fervor about it comes from people who are either convinced it's the worst thing since dioxin, would like you to buy their stevia leaves, or are pushing macrobiotic diets that don't have many sweets of any kind in them. Some people are sensitive to it (it's amino acid-based and causes MSG-like reactions in some cases, and people with phenylketonuria should stay away in any case), but unless you're eating whole boxes of Equal every day, it's not a big deal (and the methanol thing is a red herring; you'd have to drink Sterno or washer fluid to get the ill effects they like to scream about. Diet cola has about as much methanol in it as fruit juice does.)
That said, aspartame doesn't actually taste very good unless you use a lot of it, and IME ace-k and Splenda work much better.