Lisa Crispin provides a couple of good stories about her experience on teams and the ratio of testers to developers in this blog entry.

The Microsoft Patterns & Practices group had put together a suggested process for implementing architecture while keeping an Agile method of software development in this article.

Test execution beyond the traditional use of developer unit tests in the Agile community has been debated. Elisabeth Hendrickson has a great article shared on her blog here.

Dhaval Panchal defines and provides usage scenarios for capturing, using, and misusing velocity in this article.

Here is the video of Brian Marick’s keynote talk at Agile Development Practices 2008.

Elisabeth Hendrickson describes a classroom situation that shows pitfalls of the “hero” attempting to do too much in this article.

Jeff Sutherland and Xebia CTO Guido Schoonheim discuss their success with teams distributed across two locations, Holland and India, with data that shows similar velocity as localized teams in this video.

If your planning meetings are becoming stagnant here are some ideas on how to spice them up from Tom Perry.

In her Agile Testing class, Elisabeth Hendrickson conducts an exercise called the WordCount Simulation that is described in detail with this blog post.

Mike Cohn has provided another great article on how a team can write non-functional requirements in a basic user story format.