The (Unofficial) Group for fans of NIS America (and NIS in general).
Nippon Ichi Software America is a localization company for games created by NIS in Japan. Games NISA has localized include Disgaea:Afternoon of Darkness (PSP/DS iterations), Disgaea 2: Cursed Memories (PS2/PSP), Disgaea 3 (PS3), Disgaea 4, Hyperdimension Neptunia (PS3), Ar Tonelico: Qoga (PS3), Phantom Brave (PS2, PSP, Wii), Cladun x2 (PC/Steam, PSP) among a number of other titles.
Seems like it will have both the digital art book and soundtrack. I'm quite surprised about the latter's inclusion. I wonder how extensive it will be? I think it's safe to say there will be no "Invasion from Within" track regardless. Hopefully it's otherwise intact.