Since TGS 2009's announcement that Kingdom Hearts Birth By Sleep would be releasing in January 2010 in Japan, it's still not been made clear exactly when. In the same article in Famitsu interviewing Nomura he also spoke about the release date;

"Well, we had to balance it with the release date of FFXIII, so once that was decided, we decided on January 2010 for BbS. We are still trying to figure out what day it will be.

At least it seems that are sticking to their guns for the January date, but they still haven't decided when it will be. For Western gamers this could potentially mean an even longer wait.