Of course, the month we're talking about here is October of 2010, but this sort of data takes time to compile, ye know, and The Nielson Company've done quite a job doing so. According to this study done by the folks at NC, the smartphone market now covers about 27.7% of the whole pie, the pie being the Total Market Share for phones in the USA. Of that smartphone percentage, three competitors stand out the strongest and are surprisingly close in their race for dominance: RIM BlackBerry OS with 27.4%, Google Android OS with 22.7%, and Apple iPhone OS with 27.9%. After that it goes Microsoft Windows Mobile, Symbian OS, Linux, and Palm OS, with 14, 3.4, 3.3, and 1.3% respectively. After that, desire sets in, and the numbers get real interesting.