If you haven't seen it already, you may find this story interesting:

Temple Gradin NPR interview

Thanks Kyle, I'll look at that.

russian writer Vladimir Nabokov is another famous synaesthesiac. for instance, when a character moves an old chest in an attic, he experiences an overlap of sight and sound that results in "a square echo"

Thanks for the Nabokov note. What I'd like to see is a list of known synaesthetes and which senses were transferred to which others, like what's found at Wikipedia, only including non-famous cases also.

wow...time for some more reading: try bright colors falsley seen by kevin dann as well as luria's mind of a mnemonist for some historical context. where is this bizarre neuroendocrine stuff coming from? and synaesthesia is MOST definitely not a symptom of autism. symptoms are not comorbidities nor associations.