The AHA recently issued information on hands-only CPR. It has caused quite a stir in the media...and quite a bit of confusion for instructors.
In short, the changes only affect bystanders and then only in a witnessed adult arrest situation. It doesn't apply to unwitnessed adult arrest, infants or children. Health care providers will still perform CPR as originally taught while on duty, but could arguably fall under the bystander category when off duty.
This link from the American Heart Association explains their intent and contains a downloadable video explaining how these changes affect current courses. It is worth watching.