I use CodeIgniter 3.0 for almost two years. So, I have "met the Spartans" yet, and I have published my work.
You may choose between two platforms:
https://github.com/ivantcholakov/starter-public-edition-3 - a traditional one, it uses HMVC by wiredesignz, adapted for CI3.0.
or
https://github.com/ivantcholakov/starter-public-edition-4 - an innovative (and therefore risky) platform, very similar to the previous one, in addition it is intended to support multiple (dependent on each other) applications within a single site.
On both of the platforms I upgrade CodeIgniter 3.0-dev constantly.
See the README files for these platforms. There are live demo's too. There are also programming examples for demonstration of some added features and for testing.
Good luck!