Compendium is available to purchase :D http://www.dota2.com/international/compendium/%22
The stretch goal's are pretty awesome :D
Unlocked Based on compendium Cash added to prize pool
-1,800,000: Evolving battle point booster
-2,000,000: Unlock treasures containing dota loading screens
-2,200,000: compendium owners can vote to decide which hero gets the next arcane item
-2,400,000: Unlock new compendium HUD
-2,600,000: compendium owners can vote on the 8 participants for the solo championship at the internationals
-2,900,000: Unlock All-random game mode for everyone
-3,200,000: Unlock treasure containing valve-made immortal items
-3,500,000: Unlock emoticons for use in dota 2 chat
-4,000,000: Unlock mini-pudge courier
-4,500,000: Unlock new music pack for dota 2
-5,000,000: Unlock 1v1 match-making mode for everyone
-5,500,000: New envirnmental effect added to map
-6,000,000: Compendium owners can customize a building in the base