Nielsen and Twitter just announced a deal for something called the Nielsen Twitter TV Rating, which they’re hoping to turn into the standard metric for measuring the conversation that a TV show spurs on Twitter. The companies say they’re planning to make the rating available commercially in the fall of 2013. The new Twitter ratings are supposed to complement Nielsen’s existing TV ratings, and will be built on top of the SocialGuide platform offered by NM Incite. (NM Incite is a joint venture between Nielsen and McKinsey, and it announced the acquisition of SocialGuide last month.) In a post on the Twitter blog, the company’s head of media Chloe Sladden said Twitter’s TV partners have been asking for “one common benchmark from which to measure the engagement of their programming.” Read the full story at TechCrunch.