New York - Viacom's (NYSE: VIA) MTV Networks on Monday announced the launch of Tribes, a series of demographic-focused vertical ad networks. The first such network, MTV Generation Tribe, launched today with Pepsi as its charter advertiser, and will include publishers focused on music, movies, teen sports, gaming and style. The company will also launch Tribes from CMT, Spike and VH1 this month, while a Comedy Central Tribe is set for the first quarter of 2009. Burst Media will serve ads and recruit and manage publishers for Tribes.

Burlington, Mass. - Burst Media, a provider of online advertising services, on Thursday announced the launch of the Burst Entertainment Network. The Network consists of more than 150 websites that reach 21 million unique visitors and deliver nearly 70 million ad impressions each month. The Burst Entertainment Network targets film and TV fans, as well as gamers and music aficionados.

Burlington, Mass. - Burst Media, a provider of online advertising services and technology, announced on Tuesday the launch of a new online advertising network aimed at independent websites. The network -- called Burst Trendsetters Network -- will focus on brand advertisers who want to reach 15-34 year olds online. Burst Media said its network includes 100 websites that reach 7 million unique visitors and delivers more than 51 million web impressions per month.