Well, look's like the album has been released online. It has been released on mnet if your wondering, although I am confused why all of the sudden perhaps to do some damage control after the songs were illegally leaked.
Check out the tracks to their latest mini album:
SS501 - Let Me Be The One
SS501 - Love Ya
SS501 - Crazy 4 U
SS501 - 영원토록
SS501 - Let Me Be The One (Acoustic Ver.)
Love Ya (Inst.)