For the past four years, I've been summarizing progress of Tor on the blog.

Our progress report for April 2012 is now available.

Our progress report for March 2012 is now available.

Our progress report for February 2012 is now available. It hightlights recent work with deep packet inspection and censorship circumvention in Iran and Kazakhstan.

Our progress report for January 2012 is available now.

Our progress report for December 2011 is available as a pdf with pretty graphs an

The progress report for November 2011 is released as pdf and

The October 2011 Progress report is available in PDF and

In September 2011 we made progress in a number of areas, such as handling issues in Iran's use of DPI to block tor, new versions of Tor, Tails 0.8 release, and more.

The August 2011 Progress Report is here, https://blog.torproject.org/files/2011-August-Monthly-Report.pdf