Google has officially shut down toolbar Page Rank to the general public. Meaning, internally Google will still be using the data, but it will no longer be visible to the public.
By all accounts this change happened on Friday, cutting off access from its official toolbar, as well as any other third party tool that accesses the data.
Google will still be using Page Rank score when determining how to rank content in search results, but individual webmasters will not have access to their Page Rank score.