Currently available on the other side of the pond from Moleskine is the Postal Notebook. Its a paperboard folio enclosure, ready-to-mail, with eight plain pages bound inside. There are two sizes available: pocket and large for £4 and £5.50 respectively and each is available in six different color paperboard covers. What a wonderful way to capture a story, long letter or a travel missive and send back to friends.
Looks like these should become available in the US around Feb 1.