Koda Kumi also passed 600k legal downloads for her song "Suki de" and is having her 10th anniversary show at the Tokyo Dome called Fantasia
Kana Nishino, as others have said, is doing really well, she's releasing a new single soon called Kimitte so you should try it out!
uhmm... that's really all I've cared about in jpop for the past few months, excluding Ayu's new releases and JYJ's.