How to make buttons and sliders for armature poses

I wonder how to make buttons and slider like in for example sintel movie character


Is that python or somehow integrated in blender 2.5 options? Maybe you know where can I learn to do that?

According the picture those controls are in the Properties panel inside the 3D view panel.
So I think it’s a custom python script.
Anyway, I’m also interested about how to get that.