Since there are some people reaching me and showing interest in helping with the implementation of the MIDI over BLE profile on Linux, I created a fork repository of BlueZ on github so others can checkout the branch midi and help it out.
The idea is just to share the MIDI profile driver with others so we can concentrate the development efforts, then send patches to the mainline BlueZ. Once it gets integrated into mainline, I will drop this repository.
As mentioned on previous blog post, the work is still undergoing and incomplete.
So, please, checkout the repository and the profile driver.