I really like Gail Gauthier's take on Jenna Bush's book deal. Let's wait to see the book (which will be about a Panamanian teen single mother with HIV) before we trash it. I for one am grateful it isn't a picture book about self-esteem (the inexplicable praise given Jamie Lee Curtis notwithstanding), and in fact, sounds like something that teens might find both interesting and valuable.
I can't even get worked up about the rumored six-figure advance. Anyone who believes that had HarperCollins not given a lot of money to Bush for her book, they would be putting it into more (equally unproven) "real" writers, hasn't looked at the HarperCollins catalog lately, nor at that of any other large publicly-held publisher. They are giving that money to Jenna Bush in hopes that it will return threefold, in some form or another (whether from sales or other business opportunities the book and/or author may generate or suggest).
Any librarian or bookseller or reviewer who has ever accepted free food from a publisher should really think first about his or her own place in the publishing economy.