Twitter, the social networking and micro-blogging service, has acquired Summize, a search tool. All five Summize engineers will move to San Francisco, CA and take jobs at Twitter, Inc. Summize is a service for searching Twitter and keeping up with emerging trends in real-time. Like Twitter, Summize offers an API so other products and services can filter the queue of updates in a variety of ways. The Summize service and API will be merged and integrated under the Twitter brand. It has been reported that Twitter paid $15 million in cash and stock for the acquisition.