Use Remaining Hours as time estimation unit on Rapid Boards

Hello team,

We would like to suggest a feature request to allow GreenHopper use the remaining hours as the estimation unit.
This is useful to track whether each team member has his plate full. Using original estimates don't work since most of the issues that customer can have span across multiple weeks to solve.
Sure original estimates provides better guideline for product management, but this way users canto up developer performance.
Please let us know your thoughts.

Thanks!