I don't think they consider the aspartame a cause of cancer, I thought that was sacarin (sp?)...you could make your own sugar free jello and use splenda instead...but I think the only way to cause cancer from Nutrasweet is if you give a 3 lbs rat 5 lbs of nutrasweet in one sitting....
Some people don't necessarily get cancer, but have other side-effects, like headaches, stomache aches, etc... I personally don't eat it just because I'm trying to stay away from artificials.