Of course not.
I'm sure it has been done before, and I'm sure that it will be done again. However, it might not be documented as well as these guys from The Unnamed Blog, especially with the variety of beers they tried. A few floats sounded vaguely intriguing like the Guinness float, while others sounded plain wrong like the Grolsch float.
I'm glad to see that creativity is hard at work.