Twitter plans to launch a free analytics dashboard that will help its users – especially businesses – understand how others are interacting with their tweets. Member of Twitter’s (Twitter) business development team Ross Hoffman has revealed at the Sports Marketing Summit that Twitter plans to launch the dashboard in the last quarter of 2010. He was speaking in the context of sports, but there’s no reason to believe the tool won’t be available to other users, too. The team that works on this tool is the one behind Trendly, which Twitter had acquired in June. Trendly was all about highlighting important changes in the traffic that reaches your website, and, according to Hoffman, Twitter’s analytics solution will show you which tweets are spreading and which users are influential in your network. There are two interesting things about this announcement. First of all, if the product will be free, then Twitter won’t be making any money out of it, and one possible business model for Tw...