Our guess is that eventually Coke will link all the machines so that instead of having to reenter your custom flavour everytime you’ll be able to enter your own code and the Freestyle machine / network will take care of the rest. There’s also the possiblity of integrating the machines with a web site (or social network widget) and letting people share their custom flavours. Similar to Abobe’s Kuler (http://kular.adobe.com) but slightly  different.