Some more information on the legal situation in Germany as well as Austria: All rights of use were inherited by the state of Bavaria. The state is trying hard to prevent uncommented reproduction of the book. Anyway reprints have been published in english-speaking countries, Israel (in English as well as Hebrew) and Skandinavia, where the legal situation is not completely clear.
According to a German court order it is allowed to sell and buy old prints of Mein Kampf as antique, hence owning old prints or new, commented versions is legal in Germany. In Austria it comes under the strict law of Wiederbetätigung (reactivation of Nazi ideas), which includes the prohibition of Nazi weapons, books as well as the swastika. The book is also not available in "normal" libraries, but you can ask for the book in the Austrian National Library in Vienna. Before you can borrow it for 6 weeks you have to prove that you need it for research (e.g. for writing your dissertation or a similar work, usually rather for university than school). The possession of the book is also not prosecuted when the owner is a history professor or teacher.
The copyright of the work will end on December 31, 2015.