Based on Ubuntu 12.10 "Quantal Quetzal," PicUntu 0.9 release candidate 2.2 is the latest version of the operating system available, and--as of last week--it's available as a free download with numerous bug fixes over previous versions.
For Linux users, it requires only a 23 KB download, yet it can run most complex computer tasks at no more than 10W of power. Performance, in fact, nears that of i3-based laptops, the company says. Configuration, meanwhile, is entirely menu-driven.
PicUntu has also been tested on the MK808 and UG802 devices, and "we confirm, this time your experience with this will be much smoother," the project team says.
Do you have an RK3066-based tiny device? If so, please post your reactions in the comments if you decide to try out this new OS.