WPP Group has made an investment in online game maker WildTangent as part of a $13 million round of financing. The holding company is said to have invested $3 million. WildTangent has previously created games for WPP agency clients Novartis and Unilever, among others. | Call it "Snakes on a Dell": The PC maker launched an online campaign around New Line's "Snakes on a Plane" to promote its 37-inch high-definition LCD TV, saying it has a "frighteningly vivid picture." The TVs are featured in the film. Dell will expand the tie-in around the release of the DVD, promoting it in its print catalog. | Coca-Cola's Coke Zero, Chevrolet, Best Buy, T-Mobile and Washington Mutual will sponsor AOL and Mark Burnett Productions' online reality series "Gold Rush" for its seven-week run. The web series launches Sept. 13 at aol.com/goldrush. | USA Network's reality show "Nashville Star" has secured drive-in restaurant chain Sonic as a major sponsor. Sonic will be integrated into the show's fifth season next year through signage at auditions, in-show placements, the series' website, promo spots, and print and radio advertising. Sonic will also be involved in casting, the live show and the show's concert tour.