It seems that Microsoft has saved the best for last with their Summer of Arcade promotion, because Humble Hearts, developer of the title, has released a launch trailer for Dust: An Elysian Tail. The trailer can be seen below and you may just want to prepare yourself first, because the trailer may just make every other XBLA game released so far to shame.
Dust: An Elysian Tail will follow the story of Dust, a warrior looking to recover his memories and also put an end to the monsters roaming the land. Alongside him is an ancient sword called Ahrah and a flying companion named Fidget. The title will be released next week on August 15th for 1200 MSP and looks like it will be well worth the cost.