Press materials in English + dvd out to buy
If you want to read lots of excellent material about the Alatriste film, the people at fan site Viggo-works have taken the enormous trouble of translating everything that they could find on the Spanish press, including some superb photos. As there's hardly anything out there in English, I'm sure you'll enjoy it enormously.
http://viggo-works.com/index.php?page=855
If you only have time for one, I recommend this one from El PaĆs
http://viggo-works.com/index.php?page=863
Then, the film is coming out to buy on dvd next week. The Spanish release has subtitles in English and French, but I don't know how well they would play in American machines, what with the region codes and all.
http://www.zonadvd.com/modules.php?name=News&file=article&sid=6801