truthaboutsplenda.com (Website by the unbiased Sugar Association)
Sucralose Toxicity Info (Article on the health aspects of consuming chlorinated sucrose derivatives - there are also articles on the dangers of aspartame on this website... see below)
NPR Market Place (A 2/08/05 broadcast from NPR when Splenda took the sugar industry to court, claiming they had been the target of false and misleading reports.)
Take it with a grain of...er... sugar if you must, but I always favor educated decisions.
While you're being educated, here's a Snopes article on Aspartame (which is not in Splenda).