Stamina orb?

I have a question about the barbarian's ui. In the gameplay trailer when you read the description of hammer of the ancients, for example, it says it costs Stamina, and when the player uses it, it consumes a part of the blue orb in the right. Fury charge consumes 20 fury, and when he barbarian uses fury charge, it uses consumes like 1/4 of the blue orb, so I dont understand this.

Maybe it's been asked before, or someone that played the demo at blizzcon 08 knows the answer to this question, is there a stamina orb for the barbarian?

Sorry if my english is not so good |||The original gameplay trailer has aged quite a bit looking back. The blue mana orb on the barbarian is currently replaced by "Traffic lights" Fury system. Where fighting and doing damage builds up Fury, you then use your gathered Fury to use most of your skills. The Fury drains over time when your not fighting any monsters.