A couple days ago I posted about a nice video on InfoQ of Fred George talking about Appling Agile to Ruby.  The video on InfoQ was my first exposure to Fred, however, I recently came across his blog (via Jeremy and the ThoughtWorks feed).  Fred has a bunch of great content, such as:

• The Secret Assumption of Agile
• All Programmers are NOT Created Equal (People Topic)
• Masters, Journeymen, and Apprentices: Part 1
• Masters, Journeymen, and Apprentices: Part 2
• Masters, Journeymen, and Apprentices: Part 3
• Building a Better Programmer, Part 1
• Building a Better Programmer, Part 2
  

And some choice quotes:

Agile succeeds when you write code that is easy to change. The Secret Assumption of Agile

Okay, so it may not be true that all programmers are equal. But it is it approximately right? In my experience (many, many years)
on real projects with real delivery deadlines, there is an order of magnitude difference between programmers (that is, 10x difference). Even after throwing out the incompetent programmers (who produce zero), the really good programmers are ten times better than the really mediocre programmers. So even in approximate terms, all programmers are not equal. - All Programmers are NOT Created Equal (People Topic)