I have managed to create ebuild for Observation Manager 1.020 recently released. Old versions were not working with system install (AFAIR, they attempted to write to /usr/share/), but 1.020 seems to work.
It was a difficult task, as package has two source packages with individual Ant project for modules in each package.
If you are Gentoo-using amateur astronomer, fill free to check my Gentoo Astronomy overlay!
Tags: gentoo