Hacker News on 28 September 2011

• Hey Google, I want my cache links back
• Introducing Amazon Silk
• Python and Django on Heroku
• Princeton bans academics from handing copyright to journal publishers
• Amazon Unveils $199 Kindle Fire Tablet
• How Porsche hacked the financial system and made a killing (2009)
• Chris Espinosa: Fire
• Carnegie Mellon face recognition study has unsettling results
• How Exercise Can Strengthen the Brain
• You’re Pricing It Wrong: Software Pricing Demystified