Hacker News on 31 January 2012

• Beginners Guide to HTML/CSS
• Dear business people, an iOS app actually takes a lot of work
• I Wasn't Paid
• Id Software Open Source releases on GitHub
• Hacking the Used Car Purchase
• I Was Just Told “You would not have made it through the weekend”
• The Humble Bundle for Android (and Mac / Windows / Linux)
• No longer loving Google
• Giving away the secrets of 99.3% email delivery
• Tesla Model S Options and Pricing