Build the Yahoo phone.<p>Mayer has the product experience to do it.<p>What do people do most with their phones? Email, messaging, photos, news, small games. Yahoo is strong in every one of these and more established across the board than all its competitors.<p>She can leverage Android/Ubuntu because she knows plenty of Unix developers, Amazon is paving the way for non-Google Android products, and the new Ubuntu mobile OS is pretty amazing.<p>She can leverage Flickr. This is Yahoo's golden answer to Facebook's Instagram, a $1b equal. Imagine a Yahoo phone with built-in Flickr upload and sharing.<p>She can leverage Yahoo media content alliances to provide a great content-driven phone, with news, music, and movies. I daresay Yahoo can pull ahead of even Apple and Amazon on these fronts.<p>She can leverage social networking: Yahoo Instant Messenger is a leader, Games is a leader, and Social Bar had 90m users and was a significant leader of Facebook’s Open Graph.<p>She can leverage Yahoo mail. Yahoo is still a huge player in email, ahead of Gmail in terms of users and IMHO interface as well.<p>Manufacturing and distribution can be outsourced. HTC is great for this. Start with a small phone, 3G, for mom and pop, and a $99 price point. Compete with the iPhone on price, and with Google phones on content. Subsidize like Amazon Prime.<p>Most important, Yahoo needs a rallying point-- a bold vision , something amazing to attract top developers and bring together diverse properties. The best way to do this is to go big.<p>If you're a mobile developer, who do you look to for leadership right now? Google/Android is splintered, Microsoft/Nokia seems DOA, Apple/iOS is walled, Facebook is admittedly behind, and Amazon is just gearing up.<p>Mobile is where all the action is happening, and it's where all these big competitors are going as fast as they can-- yet none has the mobile space well entrenched yet. This is Yahoo's perfect opportunity to bring it all together, to hire and inspire developers, and build a world-class integrated product. I believe the board knows this.<p>Yahoo has all the pieces to make this a home run. What they've been missing is the product leader. My money's on Mayer to do this.