Hacker News on 10 April 2009

• The Founder Visa
• How to block the DiggBar
• Will it lens?
• Get Rich Slow
• Sorting algorithms compared and animated
• Stress and its consequences for software development
• TechCrunch Tablet makes an early debut
• IP address geolocation SQL database
• IP Address Geolocation Javascript API : JSON Response
• Ask HN: what linear algebra do you use most often for practical problems?