Working from home, the postman's the only person I have to watch out for, so cubicle dwellers will have greater need for a boss-watching periscope than I do. Using a few supplies you'll be closing the Gizmodo tab well within time.
You'll need to attach a couple of binder clips to a mirror at the top of a cardboard tube mounted in front of your desk, with an iSight camera hiding just inside the tube, facing upwards. The camera being connected to your PC in front of you, and you'll be on track to being a star office performer in no time - just like clever Flickr user Ian, whose handiwork you see here. [Flickr via Unplggd]