A moderate defense of George Berkeley?

On first glance Berkeley's philosophy seems silly.  An object is not real in the classical sense, but only exists as it is perceived and constituted by the observer's stable recollection of its properties.  I don't hold to British Empiricism, but this raises an interesting point.

Heisenberg and Quantum Mechanics point out that an object (albeit on the sub-atomic level) behaves differently depending on the location of the observer.