The generous folks at the Gatorade company sent me a couple of samples of the new Gatorade Natural products to try and I like them! The flavor is good (the low calorie version is a little too sweet for me so I preferred the regular) and they don't give me the bloated feeling that I can sometimes get when I eat or drink things that contain HFCS.
What I especially like about Gatorade is the massive amount of research done by their Gatorade Sports Science Institute (GSSI). These people know hydration!
Right now Gatorade Natural is only available at Whole Foods Markets in select cities (see the website for locations). If you can get your hands on some, give it a try!