Google Reader for GNOME.
WARNING: This application is still in develovepment.
You can already use it for your daily reading needs, but
gtk3 still gets
into not-working state once in a while.
Goal is to provide pleasant, clean and integrated reading experience. Replicating full Google Reader functionality (e.g. feed management – you can subscribe, but there's no way to effectively manage your subscribtions yet) is only a secondary goal.
Timeline and descriptions can be found at milestones page.