I'm not sure exactly when the site opened its doors, but Amazon Italia is now open for business.
It may not carry the full range of products that the UK or US site carry, but it does carry a good selection of titles.
Some of the features that I would use don't seem to be available at present, so there's no way, for example, to setup a wishlist.
I guess these and other features will become available over time.
Now where's the Spanish site?