I spent almost 40 hours to build this. This project test my patience and soldering skill. If you want to build one yourself, follow this site that has a detailed step-by-step instructions with source code. I also purchased an 8x8x8 LED cube kit from eBay which I haven't construct yet. Will post it up once is done.
I showed this during the Penang Mini Maker Faire 2014 together with my friend's LED Message Board and 3D Cube booth.