Today I hacked Eagle to add Maemo platform. Port was quite trivial because Maemo is almost pure GTK with some extra classes to fit better embedded systems.
However I opted to not port every component, like HildonColorButton or HildonNote because I think they're not well designed, they don't even provide signal "changed", used by Eagle's DataWidget to persist data automatically. As API will change in Maemo 2.0, I won't bother with this until then.
In previous screenshot you can see my little platform specific addition: automatic generated menu. Another addition is support for fullscreen button