Media Bubble: Oprah, Nielsen; Nielsen, Oprah

• Oprah gives Dave biggest audience in a decade. [Newsday]
• Kurt Andersen wonders: Whither Harper's sans Lapham? [NYM]
• The Week, says Jon Friedman, is "Godfather of the Blogosphere — or the first blogazine." And it just wants to be loved. [MW]
• Today is Viacom's first day as two companies — one high-growth, one…