Twitter's preparing to take another step away from its revenue-less past, according to a new report. Rumor has it that a fresh "Promoted Trends" feature will complement the system of Promoted Tweets the company's already devised. Peter Kafka wrote this afternoon, "Advertisers will be able to insert their own term into the list of trends that Twitter displays on users' home pages and on its login page. Clicking on that term would call up a Twitter search results page,