Halloween is tomorrow so it may be a little late to start on that paper-mache masterpiece you've been dreaming up, but with a little foresight and planning you could have made something truly incredible like this -- a Locutus of Borg costume with working lights, robotics, and everything. The ultimate sci-fi geek's costume.
It's a little more disco than I remember, though he has to be commended on wearing a Patrick Stewart costume under his borg costume; that's a Trekky's dedication for you. This isn't the kind of project for the faint hearted though, as Instructables author djkendog says:
"I spent over 300 hours on this bad boy and worked very consistently to finish before the Halloween 2012! I have hot glue burns, solder burns, razor cuts, drill bit cuts, and super glue still on my fingers, haha, It can get brutal, but I'm Pretty happy with how it turned out!"
300 Hours! Just goes to show that persistance isn't futile. [Instructables]