Okay, how about the formaldehyde issue?

Read the Barcelona Study in it's complete form.

A simple MEDLINE search reveals that the levels of formaldehyde they are talking about (30 micrograms after the ingestion of 200 mg/kg/day of aspartame for 11 days) are well within 'safe' levels, even though 200 mg/kg is equal to about 60 Diet Cokes per day(!) and this abstract states that the safe level of formaldehyde consumption is 3 mg/kg/day. In other words, consuming 210 milligrams of formaldehyde per day is safe for someone who weighs 70kg (about 154 pounds). Note that 30 micrograms is 0.030 milligrams.

So the Barcelona study shows levels of measured formaldehyde exposure after ingesting aspartame equivelent to 60 Diet Cokes was 1/6000 of the acceptable daily limit for formaldehyde ingestion. Even if we say that there is a 100x difference in aspartame->formaldehyde metabolism between rats and humans and use the lowest level of natural formaldehyde found in foods (20 mg/kg) as the acceptable limit, this still means that consuming 60 Diet Cokes will cause your ingestion of formaldehyde to be 1/6th of the acceptable limit.

And this is a study that the anti-aspartame sites use to show aspartame is DANGEROUS!

Don't we have more important things to worry about?