We've all had those days when we suddenly say to ourselves, "Gosh, I wish I had my very own Predator drone. The things I could keep under surveillance! The neighbors I could buzz! Yes, my life is empty without it." Fortunately, for people like us, there is DIY Drones, a site dedicated to telling you how to build your own unmanned aerial vehicle for under $1000 using things like LEGO Mindstorms kits or BASIC Stamp kits to add navigation and other behaviors to RC airplanes.
Via MeFi. Photo from diydrones.com