That is a playlist of the songs that Stephenie listened to when 写作 the book. The film prodoucers, director, and 音乐 editors look to her 列表 just like they did with Twilight and try to incorprate some of the 音乐 she has on her 列表 into the film. So far I know Muse, The All-American Rejects, and possibly Blue October, will be on the soundtrack. I also know that Band of Skulls, The Used, Milow, and Radiohead's Thom Yorke and Bon Iver were also being looked at to 加入 the soundtrack.
So the 列表 Stephenie has up on her page was some of the 音乐 she listen to when 写作 the book and the B,J and E were from who's point of view the song was coming from.