Currently, researchers from varied disciplines are interested in both commercial potentials and technological challenges introduced by networked control systems (NCS), since NCS provide flexible sensory information processing and distributed actuator manipulating. Although the techniques for building NCS accelerate notably in industrial and university research centers during the last few years, many fundamental questions regarding the co-design of control and communication remain to be thoroughly answered. This paper summarizes some recent developments in this field, addresses several key findings and trends, and also discusses some interesting problems.