Over Christmas, my mom asked me if I wanted sweetener for my tea. I'm spoiled now, because I love the way stevia tastes, so I asked if she had any. She goes, "What's stevia?" Stevia rebaudiana Bertoni is an herb that's sweet like sugar, but it has no calories.
Imagine a sweetener that's actually good for you. I've been sweetening my coffee and tea with stevia for about six months. I bought some at a hippie grocery store, and I like it better than Splenda, Sweet & Low, or processed sugar. It is has no carbs, no calories, and no glycemic index, but it tastes naturally sweet.
Splenda is chlorinated sugar. Your body won't absorb it (much). Saccharine (Sweet & Low) and Aspartame (Equal) are not good for you, either. If you are diabetic, dieting, or just health conscious, you should try stevia, just to see if you like it better. I'm a fan.