Over at Pigeon Post Systems were are in the process of setting up an open standards platform for a fully automated package delivery system.
Check out www.pigeonpost.co for more details but the question I'm asking here is:
Any existing UAV projects or systems used to deliver physical packages?
(I know about the uav tower building project but as that was a closed internal system it's not really what I'm looking for.)
Replies
We have just finished the latest version of our ProDropper system. 4-8S input, 12V DC output (for search light), UAVCAN and PWM control options. Achieved 40kg on the bench.

Side by side with Andreas' standard EPM. Ours is on the left.
have a look at our OpenRelief project based out of UK and Japan. We are building a number of payload carrying Drones.
Ed
Hey, I'm working on getting mine to deliver burritos! Check out my winch:
http://youtu.be/wGwa2DG2Cs0