I think you know my story. In addition to what our members will provide for you, you might check out the Chelation Progress Reports and Adverse Reactions folders in the Links section of the yahoo frequent dose chelation group.
Dr. Amy Holmes. Early results with autistic children.
Roughly 58% of children under 12 (75% < age 6) made "moderate" or greater improvement in less than a year on a variation of the Cutler protocol. She has/had an autistic son. http://www.healing-arts.org/children/holmes.htm#results
I've been following some of the members of the groups who are regular contributors and who also have credible stories. (there are a few I don't believe from those who have major psychiatric symptoms!)
As you can see, chelation does not provide immortality! It can also take years for very sick folks to greatly improve (no one should expect this degree of improvement in less than a year). However, a combination of Amalgam removal, a *safe* form of chelation and supplements to offset Hg's effects on the body are quite likely to improve a person's situation when HMs are actually part of the problem.