Microflyers on Mars
Birds of Fire writes: "This article on Yahoo reports on work in Australia to develop tiny aircraft for Mars exploration. "Aircraft weighing as little as a chocolate bar could one day be darting over the surface of Mars with the agility of dragonflies and the eyes of bees."
Here, this is a much better link with information on the entire system in which the microflyers would be used and how they would communicate. Evidently the microflyers are a portion of the proposed mission, other little robots and such would join in for a land/air/etc/etc type team.