MSN Health & Fitness reports: "According to a recent survey, seven out of 10 adults say they want to reduce or avoid added sugars. To do so, they’re turning to sweeteners that deliver zero or minimal calories. Data from Mintel, a market research group in Chicago, shows that while sales of caloric sweeteners like sugar have been declining in recent years, sales of 'diet'-friendly substitutes have skyrocketed, increasing by about 50 percent from 2000 to 2006. And since 66 percent of Americans are overweight and 20.8 million have diabetes, even many health experts are advocating the use of these sugar substitutes."
I have read too many scary things about sugar substitutes, so I stopped using them. Although, Stevia looks promising to me.