My girlfriend's brother's company was behind the installation of this monstrosity a few years ago. I've been to Manhattan a few times since it was installed but never did see it in person.
If you google "nyc penny harvest" images you'll be able to see it as it was being laid out.
unfortunately, this year's Common Cents Drive coincided with an outbreak of the swine flu, and participation and contributions were severely limited. In order to hit the magic $1,000,000 mark, the City of New York contacted Hoard, and arranged to borrow a fraction of his tons to make up the 60,000,000 pennies they were short. Word is, the Post Office is extremely annoyed