RIM's BlackBerry platform is still the most popular mobile smartphone platform in the U.S., but Google's Android was the big winner in the last quarter of 2009. According to comScore, Android's share of the U.S. mobile market more than doubled from 2.5% in September 2009 to 5.2% in December. While the Nexus One might not be a bestseller just yet, tweetmeme_url = 'http://www.readwriteweb.com/archives/android_market_share_doubles_will_overtake_palm_soon.php';tweetmeme_source = 'rww';it's clear that the Android platform is poised for rapid growth in the next few months, as more and more manufactures continue to release Android-based phones. Sponsor Good News for Android - More Bad News for Palm Among the top 5 mobile platforms (RIM, Apple, Microsoft, Palm and Google), Palm lost the largest amount of market share in the last few months.