MWW Group has added three clients to its roster: The Museum of Mathematics, which will open in New York in 2012; Latinum Network, which works to connect brands with the U.S. Hispanic market; and StarGreetz, which uses the voices and images of celebrities in online and mobile messaging, like voice mail and viral video.

Tara Ink, which specializes in promotions for high-end luxury brands, has added eight new clients to its roster. Among them, The Plum Network, which is launching Plum Miami magazine; Poko Pano, a Brazilian beachwear company that will be showing at Mercedes-Benz Fashion Week Swim 2012; Cosmo Summer Splash 2011, the annual fashion show that will take place on July 14; and Haven, a new gastro-lounge on Miami’s Lincoln Road.

Puradyn Filter Technologies, an oil filtration system manufacturer, has chosen Monarch Communications for PR targeting potential investors and consumers.

Utah’s Method Communications has added six new clients recently, including XYDO, a social service to personalize your news feed, CampusBookRentals.com, and the University of Utah.

Visible World, a company that provides targeted advertising services, has enlisted Rubenstein PR for publicity services.

SocialGuide, which provides a real-time guide to what’s being said about TV and web TV programming on social networks, has hired Trylon SMR as AOR for its media relations efforts.