@Kingfalcon: I'm going to second this assertion. As a health-care professional, I can assure you that there is no compelling or conclusive evidence that links ingestion of diet soda with any carcinogenic events. The main reason that we keep hearing about the dangers of aspartame and such is that certain analogues of aspartame and saccharin are mildly carcinogenic, thus some unscrupulous medical professionals make wild claims about their dangers while providing no direct evidence. Don't listen to the crappy science of whatever major news source you might frequent, most (if not all) health/science news in popular journalism is alarmist and sensational.
@LiquidPrince If someone has convinced you that the cause of any sort of cancer you may have unfortunately experienced is the cause of diet soda you must listen to me and ignore their advice completely in the future. One of the most difficult clinical diagnoses is to find the cause of carcinoma. Its even difficult for doctors to definitively claim smoking as the cause of certain cancers even though the links from smoking to cancer are much much more well understood than most others.
