Playful Kiss will be showing in Japan this coming December and MNET opened it's site for PK.
source: http://www.mnetjapan.com/drama/0543/
I read from Dulce that Mnet's currently doing a poll of their previous variety shows of idol groups. Currently, SS501 is on the top 3 of their poll " What variety show you wish to see again? ". SS501's SOS in on the top 3. Check the poll HERE.