Forum member nick91884 informs us that the limited edition LEGO Moleskine Notebooks are now available for sale at Amazon.com. For folks in Canada, they are also now available for sale at Amazon.ca. For Europe, they will be available for sale on May 5, 2012.
In the US, all four Moleskine books are discounted by 32% off right now. The one shown below is the black one for $14.93 (reg.$21.95).