http://diydrones.com/ http://diydrones.com/ I've seen the Arduino drone guys report they've been able to land within 6m of their target. Not perfect, but cons

http://diydrones.com/ http://diydrones.com/ I've seen the Arduino drone guys report they've been able to land within 6m of their target. Not perfect, but considering the whole shebang is built by hobbyists for a couple hundred dollars, I'll excuse them.