The August 2011 Progress Report is here, https://blog.torproject.org/files/2011-August-Monthly-Report.pdf
The July 2011 Progress Report is at the bottom of this post and at https://blog.torproject.org/files/2011-Jul
The June 2011 progress report is at the bottom of this post and at https://blog.torproject.org/files/2011-Jun
The May 2011 progress report is available at the bottom of this post and at https://blog.torproject.org/files/
The April 2011 Progress Report is attached to this post and available at https://blog.torproject.org/files/2
Introducing a new monthly progress report format. Since June 2008, I've been posting the monthly reports we write for our sponsors as blog posts.