Hacker News on 19 May 2007

• Are you thinking of submitting your company to TechCrunch20 conference? Think again!
• What programming languages should I learn and why?
• Inside Facebook by Karel Baloun
• Forget 'The Long Tail' - Go For The Sweet Spike
• Backpack & Reddit - examples of "frictionless" user interfaces
• Entrepreneurship Lessons from Calvin & Hobbes
• Highlight of TiECON - 13 yr. old CEO
• Your Ad Goes Here
• DHH's Rails Keynote
• SharedReviews Paid Opinions