There was a link that I followed about a week and a half ago (its already gone from the history file on this machine) that went into detail about that conspiracy theory and throughly debunked it.

Woohoo! Found it: http://198.64.129.160/cokelore/ - I don't know if I got that url off this BBS or my company's internal news server. Anyway, it has more information than you ever wanted to know about Coke.