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Check out Ari Balogh's geek makeover! In jumping from stiffly corporate VeriSign to stiffly corporate-but-trying-pretend-otherwise Yahoo, the CTO ditched the '70s mustache and switched to an open-necked sweater for a keynote at Web 2.0 Expo. The upshot: Yahoo is "rewiring" itself to be more "open." As with Balogh's sweater, those who use this openness to get a closer look may get frightened. Yahoo's software certainly requires rewiring, but putting a new layer on top of it and inviting software developers to build applications using Yahoo services won't solve the problem. As one ex-Yahoo put it to me, vast swaths of Yahoo are built on "spaghetti code," poorly maintained and poorly understood software that's prone to breakage. Opening this up to developers may lead to all kinds of surprises, but not the kind Yahoo's tech-indifferent executives hope for. (Photo by Dan Farber)