Leave it to Gizmodo to turn up "the ultimate stoner gadget": the Volcano Herb Vaporizer:
The Volcano is the Ferrari of tobacco and herbal vaporizers. Instead of burning, it atomizes. There's no smoke, and no carcinogens. Just sweet, sweet, vapor that is so efficient that your herbs will be 3-4 times more effective... making you 3-4 times less effective.
Teehee, get it? What follows is an incredibly in depth review of this product. As a non-smoker myself, I am merely passing this information on as a public service announcement. Gizmodo also recently wrote about a cell phone-based breathalyzer, which is more my kind of gizmo; at any rate, we applaud Gizmodo's fearless investigations into these technologies.