Went to Firehouse Subs with some folks from work for lunch today, and they had the new Coke Freestyle machine.
To be honest, I'd be much happier with a standard fountain machine. It takes too long to use this contraption for very little benefit.
There was a now-defunct chain called "Camile's" that had a unique Coke machine, much more like a traditional fountain, but it had the ability to do "flavor boosts" of lemon, lime, vanilla and raspberry by selecting a lighted panel above the soda head. That was a better solution in my experience, but I haven't seen one since.