The Google AdSense blog announced they are testing an expanded version of category blocking called general category blocking. Google explained:
General category blocking will allow you to block even more categories of ads from appearing on your site. We’re testing this feature with 170 more specific categories, including finance, travel, job, and automotive. This feature will allow publishers to block up to 50 ad categories from among a broad range of 170 fine grained categories. To help you understand potential changes to your earnings, we’ll provide you with the percentage of your total revenue and total impressions that fall under each category.
For more information see the Google blog.