DistressedVolatility.com is a relatively new blog that is dedicated to following the global financial markets. The topics range anywhere from unusual option activity to George Soros in Davos, Switzerland.
As the name implies DistressedVolatility looks at options in depth. For instance in this post he looks at the SP500 and the sentiment using put call ratios, the VIX, and even short interest. Here in another post he correctly called the big move up in TBT right before it made a breakout to the upside. He not only called it but he provided a good explanation as to why you would get in.
Altogether this is a good blog and is definitely worth putting in your RSS reader. You can also follow him on Twitter at Twitter.com/Dvolatility