Their OHP are now taking pre-orders on their 2011 calendar up until November 24th. The paper size is A2 and will come with 13 pages of Mea-someness. The calendar will be shipped out around December and costs 3,000 yen (roughly $35 USD right now).
If there are any questions and inquiries about the item, please contact dateotoko@nightmare-web.com.
Source: OHP