Just in case you missed it we've added Blood Sand Arena to the products catalog along with a link to download it from Wizards of the Coast (dead link)
The fires of the crimson sun burn hot as your group of vagabonds band together to face intrigue, betrayal, and the beasts of Bloodsand Arena. Can your group survive and earn glory in the world of Dark Sun?
This Dungeons & Dragons adventure folio, created for Free RPG Day 2010, previews the Dark Sun setting, available in August 2010. Bloodsand Arena is designed for 1st-level characters and contains two short adventures, a double-sided poster map of key encounter areas, and a pack of six pre-generated D&D characters.