Link list for today

1. Yes, CEOs Should Facebook And Twitter
2. NYTimes: Why Bad Times Nurture New Inventions
3. Google releases Jakiu codes for their App Engine
4. Slow Computers Are the Only Reason We Still Get Breaks
5. Siftables - Making the digital physical
6. The Economists: An idea whose time has come
7. Niche Social Networking sites
8. Facebook Connect for iPhone: "I like this".