Have you guys checked out Hansen's "Sparkling Sleek" lineup? It consists of 4 core flavors & 2 green teas, with Sugar Free versions of those also available. I recently tried the Valencia Orange flavor.

Basically, this seems to be a sparking water line aimed at the same healthy/nutritional market... though it does use cane sugar, so you've got 90 calories there. The classic collection of "no HFCS/preservatives/artificial colors/caffeine" is also played up in the marketing.

Overall, this flavor wasn't too bad. Tasted like bubbly water with a hint of orange... which I guess was the point. (Full review if you really, really love bubbly water!)

The other flavors are Blueberry-Pomegranate, Dragonfruit, Cranberry-Grapefruit, Pomegrante Green Tea, and Tangerine Green Tea. I hope to get around to tasting those flavors as well... though sparkling water in a can isn't the most appealing thing in the world.

I'm completly addicted to the cranberry-grapefruit flavor. IMO, its the perfect amount of carbonation and sweetness.

Plus the last two times I picked it up from Whole Foods, there was a price error and I got four-packs for $3! Needless to say I've stocked up