Hacker News on 17 October 2009

• How Wall Street is making its billions
• Design Lessons & Advice from Building Large Scale Distributed Systems at Google
• CD Baby’s Shipment Confirmation Email
• Math Overflow (A StackExchange site for Maths)
• Shady Microsoft Plugin Pokes "Critical" Hole In Firefox Security
• Scheme illustrated
• MIT helicopter uses lasers to navigate indoors
• Ask HN: Please review my app: Was it up? - dead simple monitoring
• Why there aren't more software startups in India
• Beware The Reverse Brain Drain To India And China