Hacker News on 21 September 2007

• How to Do Philosophy
• Google To "Out Open" Facebook On November 5
• Ruby on Rails Security Guide
• The man with the Y Combinator tattoo
• Coding Horror: Everything Is Fast For Small n
• Founders at Work - Xobni Beta!
• Python indentation: very nice explanation for the curious or skeptical
• How great programmers learned their craft (interview)
• Functional Programming in Python
• Web applications don't follow Moore's law (Google developer)