The convergence of mobile communications and distributed networked computing has provided the foundation for the development of a new channel of electronic business - mobile business. Building on the strengths of this medium, the context of the individual and the nature of mobile devices, the scope of this new channel is immense, and we see novel solutions being applied in consumer, business, government, healthcare and many other areas. Following practice, research into mobile business has begun to grow significantly over the last five years to the point where we now see dedicated journals and conferences. The aim of this paper is to provide an assessment of the state of mobile business research. Using a detailed longitudinal analysis and taxonomy of more than 230 papers from key research outlets, we demonstrate the emergence of this research area and its current status. We also provide a critique of current research and some recommendations for future research into mobile business.