Hacker News on 1 August 2009

• ZFS, btrfs, and copy-on-write b-trees
• Where Is Xu Zhiyong?
• Can you trust TechCrunch enough to share their stories?
• PythonTurtle - the most low-threshold way for learning/teaching Python
• YC-Funded FanChatter Takes Social Media To The Ball Game
• Iranian Nuclear Accident?
• AMS Feature Column: Singular Value Decomposition
• How work expands to fill available time (1955)
• 6000 Chess Players Take Part in a "Beauty Contest"
• HTML is object code