WordPress developers (or just site admins) will be happy to know that a new book is in the works (by Alison) about securing, monitoring and generally "unhacking" WordPress.

I'm at the very early stages of writing a book about how to secure, monitor and un-hack WordPress. This book will be the culmination of everything I know about keeping WordPress hardened against attacks, how to keep an eye on your install so that you’re the first to know if something has happened, and how to handle the situation if you bought the book too late and got pwned anyway.

The book will be released as an e-book and she explains some of the specifics of that in the post - cost, pre-ordering, why an e-book and her qualifications to write and release the book as a good thing to follow.