I went way out on a limb and got ON 100% Whey in the Natural formula instead of the regular one. It only comes in 3 flavors (Chocolate, Strawberry, Vanilla) and since I always buy vanilla I bought vanilla. Tastes pretty much exactly the same as the standard formula with chemical sweeteners (Acesulfame K), has 2g more carbs per serving though as it is sweetened with Stevia and Fructose according to the label. All the other stats are the same.
Anyhow since I like to support my local merchants and economy by buying things in the store rather than online I think I will switch over to the 100% Natural formula full time. If enough people follow suit they'll likely make more flavors available too. They also have 100% Casein in a Natural formula.