I want to export some or all of the posts of a blog into a format that makes sense to a publisher (traditional or self-publisher(e.g.: Lulu.com)) (MS Word, RTF, PDF, epub, something else).
What tools are available to accomplish this?
Anthologize
A great option is the Anthologize plugin. It works with WordPress 3.0, allows you to format your book in WordPress itself, and then publish everything automatically to PDF, ePub, and other formats.