Programmable Soda?

What a cool concept ... a bottle of soda that could be any of a half-dozen flavors. OK, so I'll admit, I was only thinking a wan "that's interesting" when reading the story on Programmable Soda until I hit the line: "as well as a caffeine button", which, needless to say, really got my attention! Imagine the possibilities ... a soda bottle with 1-6 "doses" of caffeine available! Forget the flavor options ... I want beverages that go from "sissy" to "thermonuclear"!