Twinkies may yet have an infinite shelf life. Hostess Brands Inc. and one of its largest unions have agreed to go into mediation, so the company will stay in business for the time being. Hostess filed for bankruptcy last Friday, claiming a union strike ruined its operations and announcing plans to lay off all 18,500 of its employees. But a bankruptcy judge on the case said the dueling parties have to go through mediation before Hostess Inc. can sell off its assets. It won’t be a cake walk, but at least you can cancel your $1,000 Ho Ho bid on eBay.