Hacker News on 31 May 2010

• Google ditches Windows on security concerns
• Why are the east of cities usually poorer?
• Ballmer just opened the Second Envelope
• Open source Rails apps to study and learn from
• Got a startup idea? Validate it with the Startup Toolkit
• The Cleverest Ways to Use Dropbox That You’re Not Using
• Engineer #2 at Mint.com on when to join a startup
• What's a disease? Or: shoud fat/shy/alcoholic people be blamed or treated?
• Java 7: Oracle pushes a first version of closures
• Marc Andreessen - Three Necessities for Start-up Success [video]