Have advertisers figured out how to make ad money from DVRs? Have advertisers figured out how to move away from the 30-sec spot? Those are questions TiVo and Comcast Spotlight hope to get answered when they roll out a search engine for advertisements on DVRs next spring. Spotlight is among many partners working with TiVo on developing the application, which lets users type key words to search ad categories, such as automotive, travel, telecom and consumer packaged goods. Price points still are being tested. Other partners include Interpublic Group, OMD, Starcom and The Richards Group.