Documentation

Manual 2.6

Blender Wiki

Python API 2.6

Tutorials

Tutorial on official site

Noob to Pro

Blender Cookie (Jonathan Williamson)

Blender Guru

Blender Nerd (Greg Zaal)

Blender Modifier Series

Spastic Kangaroo (CharlesL)

Python

Python basic

Scripting

wiki

Blender Scripting blogspot

Blender Sushi Blog with many python scripts

Resources

Blend Swap - free blender meshes, materials, and whatnot

CG Textures - free textures

Misc

Blender Artist - Blender forum to showcase and get feedback on Blender art.

Blender Nation - Hub for Blender news, resources and art showcases.