I watched the #oneweek unveil at this afternoon on Ustream. Turns out the team assembled at George Mason University built a WordPress plugin that allows you to create custom eBooks from your blog posts and/or external RSS feeds. Projects can be assembled through a drag-and-drop interface. Publish formats currently include ePub, PDF, TEI and RTF.
From the Anthologize blog,
Use the power of WordPress to transform online content into an electronic book.
Anthologize is a free, open-source, plugin that transforms WordPress 3.0 into a platform for publishing electronic texts. Grab posts from your WordPress blog, import feeds from external sites, or create new content directly within Anthologize. Then outline, order, and edit your work, crafting it into a single volume for export in several formats, including—in this release—PDF, ePUB, TEI.
Please note that Anthologize cannot be installed on blogs hosted at WordPress.com.