I'm not sure if it's the presentation or the Sharper-Image-style design, but the Levitron Revolution somehow manages to make desktop levitation pretty cheesy. The idea is neat enough: You stick an up-to-12-oz. object onto the disc, and it floats above the base. Then, I guess, you invite people into your office to show it to them while warning them not to touch it.
I wouldn't think you'd want a powerful electromagnet on your desk, so close to your laptop, but apparently people do—the $100 device is currently sold out.