Not sure whether I should post this here or the Music section. Well, whatever =3
The anime's 1st soundtrack volume (オリジナルサウンドトラック “艦響” Vol.1) is set to come out 25th March. 52 tracks on 2 CDs, including piano arranges of the OP and ED. If I'm not wrong, first releases will also come with a special sleeve case:
http://kancolle-anime.jp/goods/?page=cd#07