Responsible credit card holders may finally be rewarded with a new formula being put to use by Fair Isaac - the company that calculates your FICO score. Consumers in good standing could see their credit scores rise by as much as 25 points under the new formula. This is seen as a more accurate way for creditors to get an idea of the likelihood of a default on unsecured loans. It is great news for those with good credit card histories, but may be bad news for those with a less than stellar record. It is now increasingly important for consumers to keep a rein on their credit card spending.

From CNN Money:
Finally, some good news about credit: Fair Isaac, the company that calculates consumer credit ratings for lenders, is rolling out a new formula that promises to favor responsible credit holders. Your FICO score could benefit. Fair Isaac began working on the new system in 2006 - before the subprime mess even unfolded - in an effort to better differentiate "good risk" borrowers from "bad risk" ones and give creditors a more accurate prediction of default. A consumer in good standing could see his or her score go up by as much as 25 points under the new formula.