Body modders rejoice! Touch interfaces may soon be coming to your tattoo if Carnegie Mellon and Microsoft Research engineers advance their concept of Skinput. So far, the team has developed an external sensor that detects acoustic vibrations on the human body, and have paired this input with a projected user interface. This is an interesting field of conceptual R&D, as there could be more far reaching and tantalizing applications with convergent developments in bio-materials engineering and thin film displays.