A consortium of magazine publishers including Time Inc. and Conde Nast are jointly building an online newsstand for magazines in multiple digital formats, according to people with knowledge of the plans. The formation of a new company to run the online newsstand -- sometimes characterized as an 'iTunes for magazines' -- may be announced in early December. Time, Conde Nast, Hearst and Meredith all intend to be equity partners in the new company, although the deals have not yet been signed. In the face of slumping print circulations for many magazines, the publishing houses are eager to exert some control over digital readership, said people at the companies, who spoke on condition of anonymity because they were not authorized to talk about the plans. In other media sectors, rivals have already formed joint ventures for the Web. Several television networks are stakeholders in Hulu, an online television and film Web site. Some music labels are partners in Vevo, a music video site powered by YouTube that will make its debut next month. The new magazine company would, in theory, make it easy to buy print and electronic copies of magazines like The New Yorker, Sports Illustrated, Esquire and Better Homes and Gardens from a single Web site. While mostly leaving the hardware to others, the alliance of competing publishers would develop software standards for magazine viewing on iPhones, BlackBerrys, e-book readers and other platforms, people familiar with the plans said. The New York Observer reported Tuesday that John Squires, a Time Inc. executive, would become the new company's interim chief executive while the partners looked for a permanent head. In June, Ann Moore, the Time Inc. chairwoman, gave Squires the responsibility of creating a digital road map for the company. 'It's increasingly clear that finding the right digital business model is crucial for the future of our business,' Moore said in a memorandum at the time. She added, 'We need to develop a strategy for the portable digital world and to refine our views on paid content.' A Time Inc. spokeswoman declined to comment Tuesday. Magazine publishers have been generally slow in experimenting with digital products, but they have shown more interest this year in extending the print experience and audience. This month Conde Nast became one of the first publishers to repurpose an entire magazine issue for the iPhone, selling a copy of GQ as an application for $2.99. Because the application was approved by the Audit Bureau of Circulations, Conde Nast will be able to count each person who downloads it as a part of GQ's December circulation. 'We know that the world of digital is far grander than display advertising,' Charles H. Townsend, Conde Nast's chief executive, said at a demonstration of the application last month. 