Bastion, the first title in this year's Summer of Arcade line-up, releases today and we are rather enamoured with it. A gorgeous and deceptively deep action-RPG with an artistic direction that stands out even at the creative vanguard that is downloadable gaming, it's a wonderful opener for Xbox Live Arcade's summer promotion. The week before release, we asked Supergiant's eloquent and interesting Greg Kasavin where it came from, and how independent development is working out...