Starting with Blender 2.5 Python scripting.

I started Blender 2.5 Python scripting with these great video tutorials by Ira Krakow, and this introduction on the Blender wiki. Some great examples of Python scrips can be found in this forum post by Crouch, and some more info can be found here. The Blender 2.52 Python API, which is unstable and badly documented can be found here.