Stevia: Natural, Low Calorie Sweetener
What can I say about stevia? In a word, Stevia's great! Okay, two words. Liquid Stevia added to plain water (or plain sparkling water if you'd prefer) adds an incredible sweetness; toss in a splash of juice or flavoring you've got instant sugar free drink in whatever flavor you want (Root Beer is my favorite).
Because the FDA won't allow Stevia to be sold as a sweetener (it's sold as a supplement only) there is no standardization regarding the sweetness. Update: Cargill has received FDA approval to bring Truvia to market; Truvia being their own stevia based sweetener. Surprisingly, as of January 2009 the FDA has still not approved stevia for food so how some companies can market it and others cannot is a curious situation.
Using too much Stevia may create a licorice-like flavor which some people do not like, so unlike cane sugar, where you can always sprinkle in a bit more, use a very light hand with Stevia. Once you find a brand you like, and know the quantities to use for your recipes, stay with that brand and you'll be happy. Here is my list of resources for Stevia and other sugar free sweeteners.
Experiment with your recipes or try one of the cookbooks listed below.