Some good news in japan vita front. Monster Monpiece Doing Well; Compile Heart Apologize For Shortages. It's good that it is doing better than they expected.
http://www.siliconera.com/2013/01/28/monster-monpiece-doing-well-compile-heart-apologize-for-shortages/
and Ninja Gaiden Sigma+ free for us plus members. That's a nice move considering Sigma plus 2 is coming next month. It gives people the chance to play through the first game and hopefully get more sales for the second.
Edit: it seems that Demon Gaze is also sold out from Stores. They issued an apolgy and stated that the game will be resupllied by january 29.
Source : http://blog.esuteru.com/archives/6891716.html the article is in japanese.