Editor's note : The following guest post is by Krishna Subramanian, co-founder of mobile ad exchange Mobclix . Mobile search is still one of the big unclaimed prizes on the mobile web. Everyone from Google and Yahoo to Apple is going after it, but Microsoft's Bing may stealthily become the king of the castle by aggressively promoting Bing through mobile apps. Let's look at each player's mobile search strategy. Apple: In The Driver's Seat During the Apple keynote in April, Steve Jobs announced the new iPhone 4.0, iAd and a few other features even he didn’t seem too excited about. Out of the many mediocre features, Mr. Jobs happened to squeeze in a declaration that, “ On mobile, search hasn't happened. People aren’t searching on their phones.” During the keynote at WWDC this month, Mr. Jobs declared that iPhone 4 users would have the opportunity to select their search engine from among Google, Yahoo, and Bing. Out of the three, Bing got a special endorsement from Mr. Jobs. Is Mr. Jobs trying to blindside the other players in this space by making them think he is not concerned about search? I’m sure all of the search traffic he is sending to Google is driving him nuts. Meanwhile, Google has happily—and quite beautifully—optimized their search results page on the iPhone to make it extremely convenient for local searches by incorporating phone numbers, maps and more within the Safari window.