CGCookie uploaded 4 complete basic animations rigs to Blend Swap free of charge for you to download and learn from under the CC-BY license model.
For everybody who is new to Blender and product rendering Alex Telford released a small tutorial which in a very compressed format highlights a best practice approach for modeling a scene and setting up lights with Blender Internal.
Working also with NURBS and T-Splines concepts such as N-Gons is very familiar to me when it comes to locally subdivide the mes for detailing. Blendercookie made this timelapsed movie demonstrating the workflow BMesh will bring to you, which eliminates many old school mesh clean up tasks when subdividing faces or edges by hand.
For all architects this might be an interesting tool box addition to evaluate. It offers an interface to design balconies, windows, and jambs providing you access to modify dimensions as well as design styles.
Peter Draculic posted a video tutorial on Youtube demonstrating how to generate a texture driven realistic seawater surface. He covers scene design as well as materials with Cycles and finale touch-ups with the compositor.
You all might now the fracture add-on in Blender. Ian Moore-Kilgannon just uploaded his latest video tutorial demonstrating how you can combine pre-made facture elements with the new dynamic paint system to drive the interaction between shards, objects, and control surfaces. This is pretty cool.
Micah Austin uploaded an interesting approach to creating anamorphic lens flare effects with Blender’s internal renderer and the compositor system using geometry and textures. Because this is hand made it is very flexible, can be customized to your needs and is usable for animation.
Spencer Dupre released a new tutorial demonstrating the new Navigation Mesh and Pathfinding features in the 2.61 Game Engine.