NISA just shipped mine~ Did you get the Premium Edition?
Sadly no, it was tempting, but I decided to go with the digital download version. I love being able to select stuff on the XMB and without putting any discs in.
Absolutely, can't wait to play it too.
There are already confirmed DLC characters too. Namely Fuuka, Desco (), Raspberyl, Adel, Rozalin, and Mao. Knowing the way NIS does things we can probably expect every other character in the history of the series too.