Who would have thought that a formerly marginal crackpot like Arianna Huffington could transform herself into the type of media mogul that a formerly powerful crackpot like Tina Brown aspires to be? And yet, how cool! These battle-axe broads — profiled in The New Yorker and The New York Times, respectively — are corralling the internet’s limitless potential for reinvention into personal power centers that no man can claim (Graydon Carter, who currently puts vanityfair.com to similar use, could do it without his magazine’s imprimatur). What I love about my fellow media-obsessed mommy bloggers — Huffington on the HuffPo and Brown on the week-old Daily Beast — is that the friends appear to have hit their strides in middle age, when society expects women to disappear. That both women have employed the “soft-launch” approach with their sites — get the tone and content right before selling advertising — confirms that mi amigo Robert Wolfe of Moosejaw was dead-on when he advised me, “Build it and they will come.” Tick, tick, tick …