Zapata Racing just released the Flyboard, a water-powered jet pack available to the public. The Flyboard gets it propulsion from a jet ski idling nearby; its hose forces water to shoot out of the user's feet. Not as cool as a the real deal the public is waiting on, but I guess this is a happy medium for now.

http://www.zapata-racing.com/uk/flyboard_uk.php

[youtube=http://www.youtube.com/watch?v=h-7RlL3YtiQ&w=500]

Wei Xinlong, a senior at Northeast Normal University in Changchun, built this for his girlfriend Sun Shasha. Methinks that if this is real and works well, the world is soon to see a whole new wave of tablet PCs.

Altoid tin alterations are pretty popular among the hacking community, but this one takes it down in size. Using the Altoids Slim tins, Instructables user Joshua Zimmerman put together these bite-sized LED flashlights for under $5. With just a tiny bit of drilling and soldering, you could easily assemble a handful of these in an hour or two.