2011 Hayes Prime Brakes @ Taipei Cycle Show

"One of six brakes sets to come off tool pieces. They will be available in June of this year. Features on these brakes include:
 Poppet Cam - deadstroke adjustment, increased fluid flow, improved durability.
Top Hat Reach Adjustment - consistent power throughout stroke, regardless of lever position.
New Light Weight Rotor.
Tool-Free Reach Adjust - one the fly adjustment
Top Loading Pads - easy to change pads without removing the wheel.
New Pad material and design."

Link:

Pink Bike