A strange count down appeared on http://www.mayonaka-tv.jp/ (though there is another there now at the time of this writing) But Aniplex will be in charge of developing the Persona 4 anime and it is looking amazingly close to the cut scenes that were in the original PS2 version. There is no set release date yet for japan nor any announcement yet coming stateside. Still this is looking amaaaaazing!
Official Site (JPN):http://www.p4a.jp/index.html
US Coverage: http://www.gamepro.com/article/news/218796/persona-4-anime-announced/