World stuff

• The New York Times
• The Wall Street Journal
• NPR Boston (a.k.a. WBUR)

Theory and Mathematics

• Terence Tao (BLOG)
  
• Michael Mitzenmacher (BLOG)
  
• Lance Fortnow (BLOG)
  
• Luca Trevisan (BLOG)
  
• The Geomblog (BLOG)