Redwood City-based BillShrink, the online service which helps users lower bills--and helps companies find customers--said today that it has launched a new savings account and CD decision engine. The firm said the new service allows users to look for the best savings accounts and certificates of deposits that consumers can get on their money. The firm said it is now tracking more than 300 savings accounts and CDs, and evaluating interest rates offered by those banks and credit unions. The new online service includes such features as evaluating ATM feeds, eligibility for credit unions, and other account features.