Historical PowerTrack is a new service launched by Gnip today as sort of a “way back machine” for the microblogging service. The company got Twitter database access only previously granted to the Library of Congress, and has archived all the tweets ever written so that they can be searched and analyzed. The goal is for developers to build tool for uncovering patterns and drawing insights from the tweet data and its connection to real world events. [Source VentureBeat]