The rules and dates of the 2014 UAV Outback Challenge have been released - http://www.uavoutbackchallenge.com.au/index.cfm?contentID=49
The aim of this challenge is to design/build/operate a UAV beyond line-of-sight to search and 2.5km area for a missing hiker and drop a bottle of water to them within a 60 minute time limit.
The is a AU$50,000 prize for the winner, which is yet to be claimed.
Last year's first-place holder CanberraUAV used a APM2 based Mugin UAV and successfully found the missing hiker. Unfortunately, the bottle drop mechanism malfunctioned before they were over the hiker.
This competition attracts entrants (both amateur and university based) from across the world and it would be awesome to see more representation from the DIYDrones community.
(FYI - I am part of the CanberraUAV team, so I'm happy to provide further advice about the challenge)