Michael Spayd has written a brilliant distillation of Scrum, as The Tao of Scrum. It boils Scrum down to its soul and essence. (Yes Sandy Scrum does have a soul).
George Dinwiddie reminds us that estimates really are just estimates: The Importance of Precise Estimates.
I love seeing the application of Agile outside of software, John Cass writes: Thinking Iteratively With Agile Marketing.
In Effective exercises for teaching TDD Gojko Adzic writes about a problem I’ve had a few times.
If your presenting at Agile2010, you owe to you audience to read: Three Steps to Make Your Next Speech Your Best by Nick Morgan.