This story was linked from the AIAA Daily Launch; I thought it would be of interest.
New Scientist (7/28, Marks) reports on how a team led by Andy Keane and Jim Scanlan of the University of Southampton "believes that 3D printing will soon allow... UAVs to go from the drawing board to flight in a matter of days," allowing designers to custom develop UAVs for a "specific application." The team joined with 3T RPD to see how quickly a drone could be made with "a number of design constraints" and a budget of £5000.
The Sulsa drone "took just two days to design and a further five days to print, making Sulsa a one-week plane. But customising future variants of this ready made design would take minutes on automated design software, says Scanlan."