SketchChair: Furniture Designed by You

Here's a Kickstarter project that I just contributed to.  The founders of SketchChair have developed software that allows you to easily design or customize a chair that can be cut by CNC routers (such as ShopBot), Laser, and other computer-controlled tools.  The software will be free but they're looking for funding for development of their online community for sharing chair designs.

Truly Awesome Rube Goldberg Machine

I don't know how long this link will stay active but here you go.  This is an amazing do-nothing machine that you need to see to believe.

Print your own Space Invaders on your 3D printer

Thingiverse user sideburn posted "Invaders!" recently and they're way cool.  If you have or have access to a 3D printer such as the MakerBot, RepRap, Dimension, Z-Corp, etc. then you can print out your very own Space Invaders ships*!

Thingiverse is a community site that encourages the free sharing of designs that can be made at home with (mostly) sophisticated tools or even small-batch manufactured depending on the license.  It's open-source for tangible stuff.

*not actual size