Their newsletter sent out earlier today announces:
Politics and Prose has officially ventured into the manga market. Manga, originally derived from the name given to a book of artist’s drawings in Edo period Japan, has become the name for entire genre of incredibly popular graphic serials from around the globe. We are beginning to stock a number of series that we love including Loveless, Kurosagi Corpse Delivery Service, Kami Kaze, 12 Days, To Terra, and Samurai Champloo. Don’t see your favorite on the shelf? Please let us know—we are continuing to add new series all the time.
This seems a bit late to me as everybody's carrying manga now, and in fact, I've noticed the amount carried dwindling in B. Daltons, and have been told that Big Planet is purposefully carrying much less.