Not being a smartass but did you recently pay for the shipping? It was a separate cost that I had to pay separately maybe two weeks ago and I got my copy yesterday.
My guess is one of two things- either her agent just said no without asking her (a reason I've heard cited before) or she's sick of talking about Alien(s). It's a shame that she's not a part of it but is she really going to bring anything new than the normal stories that she has been reciting...