Hacker News on 25 February 2008

• News.YC open-sourced
• Chris Anderson: Free! Why $0.00 Is the Future of Business
• MapReduce explained
• Country tries to censor YouTube, inadvertently launches a massive DDOS on itself.
• (1..100).inject(&:+)
• Rethinking Recommendation Engines
• Hacking Amazon images
• Do not learn Perl
• Ten Rules for Web Startups
• Mobile applications, RIP