PAMELA GELLER’S apartment, in the fashion of the blogosphere, doubles as her office. It is a modern full-floor unit in a high-rise on the East Side of Manhattan that could belong to a socialite or the editor of a lifestyle magazine. There is ample light and a tasteful lack of clutter. The kitchen appliances are made of brushed steel; the countertops are slate. In the earth-toned living room hangs a painting, in vibrant colors, of a woman in a swimsuit.