The former head of Amp’d Mobile is leveraging some of his MVNO experience with a new company designed to assist clients with their digital media strategies.

This time, Peter Adderton, founder of Amp’d as well as Boost Mobile, doesn’t have to worry about getting financing from venture capitalists, which dried up when Amp’d needed it and led in part to its Chapter 11 filing. Now, he’s got the backing of the esteemed William Morris Agency (WMA), complete with company digs in one of WMA’s buildings on Rodeo Drive in Beverly Hills.

Expect more of what Adderton is known for: “We like big-thinking ideas,” he said in an interview.

Agency 3.0, which he described more or less as a name by default rather than one they spent a lot of time dreaming up, is working with companies, content providers and advertisers to “bridge the gap between great ideas” and go-to-market executions in the digital media space, including wireless. Core offerings include digital strategy implementation, new product and brand development, content creation and user interface (UI) and content platforms.

Adderton serves as CEO and chairman. Greg Johnson, who delivered digital marketing campaigns for agencies such as McCann Worldgroup and Digitas, serves as partner and president of brands and agencies. Steve Stanford, whose background includes creating ICM’s Digital Media Group and being a co-founding partner of Icebox, is partner and president of the content and entertainment division. Scott Anderson, a co-founder of Boost Mobile and Amp’d, is partner and chief creative officer.

Agency 3.0 is a joint venture, with ownership shared among WMA, Adderton and other principals on the senior executive team.

The JV already has clients but isn’t publicizing who they are, preferring to let the clients do the talking, he said.

While the company has various goals, one of Adderton’s interests is showing developers how they should market and advertise their services, even if they are early stage and rely on VC funding. A lot of VC-funded startups spend their money on technology, but “there’s no point building the best app in the world if nobody knows about it,” he said, adding it’s important to set the brand and marketing strategies early.