Hacker News on 29 March 2011

• Quadrocopters juggle balls cooperatively
• Amazon Cloud Drive and Amazon Cloud Player
• How not to protect against SQL injection (view source)
• Pipe: Infix syntax for Python
• Lessons from GitHub's First Year
• Evan Williams on leaving Twitter
• Google indexes Stack Overflow at a rate of 10 requests per second
• Learn You a Haskell is now in print
• The infamous SCSH Scheme shell "Acknowledgements"
• How Western Diets Are Making The World Sick