Yahoo has posted a big purple link to its anti-Carl Icahn website on the front door at Yahoo.com, with a rotating set of teasers including an Icahn quote, "It's hard to understand these technology companies." Wow, they're just like bloggers who post the letters lawyers send them! But seriously, by using its reach to deliver its own insidery message to shareholders, Yahoo is finally acting like a mainstream media company. Icahn may find tech companies hard to understand, but he's probably figured this out today: He's fighting in public with an opponent whose daily audience dwarfs CNN and the Wall Street Journal. Here's a closeup:

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