Enlarge this photo

The success of a karaoke-inspired videogame that sold 4.6 million units and brought countless new gamers to a stagnant industry is reason enough for a boardroom jam session. But Harmonix founders Alex Rigopulos and Eran Egozy, creators of Guitar Hero, are tuning up for their next release. Rock Band, out this fall, will let up to four people air-band their favorite tunes using toy instruments. It may also add a new layer to Harmonix’ business model. In addition to retailing the game itself, the company plans to eventually sell songs, iTunes-style, to players online. “We’re not a game publisher,” Rigopulos says. “We’re a music company.” Welcome to Steve Jobs’ jungle, dudes.