As per Amazon Germany 'The Twilight Saga: Eclipse'
Release Date: December 9, 2010
You can pre-order at Amazon Germany
Release Date in France: November 10, 2010 Amazon France
Via KStewlicious/ and source
Amazon has yet to release a US/UK release dates, but you can Sign up to be notified when the DVD and BluRay becomes available.
The worldwide release date should also be around November 10 or so, perhaps even earlier.