The results of the Dr. Dobb's November 2009 State of the IT Union survey, which focused on agility at scale, are also available online free of charge.
My November 2007 Dr. Dobb's article Best Practices for Governing Agile Project Teams describes several strategies for agile governance.
The title of my November 2008 article Why Developers Should Demand Effective IT Governance is pretty much self explanatory.
The book IT Governance: How Top Performers Manage IT Decision Rights for Superior Results by Peter Weill and Jeanne W. Ross is considered by many to be the quintessential book on IT governance.
My paper Scaling Agile: An Executive Guide explores the issues surrounding agility at scale.
The Surveys Exploring the Current State of Information Technology Practices page links to the results of all the Dr. Dobb's surveys which I've run over the years.
My Agility@Scale blog discusses strategies for adopting and applying agile strategies in the complex environments.
Scott W. Ambler is Chief Methodologist for Agile and Lean, for IBM Rational