I don't remember this being posted here. Apparently back in January, a new chapter of Junko's room was published. This is the first activity from Ai Yazawa in about three years. I'm hoping this is a sign that her health is recovering and that one day NANA may continue.
http://www.animenewsnetwork.co.uk/news/2013-01-25/nana-yazawa-draws-new-junko-room-chapter I'm guessing this is old news for most people but if you want to share your thoughts/hopes for all things NANA to come, please feel free to do so. :)