Latin American social network Sonico has raised another $1.7 million in funding from DN Capital, along with other investors. The startup now claims more than 43 million users, up from 17 million a year-and-a-half ago. It last raised money in June 2008 when it got $4.3 million in a round, and Sonico says it is exercising an option to extend that financing. The startup will use the money to “boost our office in Brazil and grow our social communications platform.” It has added several prominent executives lately, including former Bebo and MTV exec Angel Gambino, who is now the social network’s VP of business development. More in the release.