I agree, I liked the twitter stories on the site. There were just a couple that weren't there. You get more plotting with Fitz and Gigi, more hints from Caroline about life and plans, and the one of just Lydia tweeting to Wickham was heartbreaking! They just flesh out the characters a bit more, especially the secondary ones. It's also fun to see the characters responding to actual tweets from fans so it's like they actually inhabit the real world.