Mobile application downloads are poised to soar from 10.7 billion in 2010 to an astounding 182.7 billion in 2015, according to a forecast issued last month by research firm IDC. Many developers are already introducing groundbreaking, immersive mobile applications, of course--just last week, FierceMobileContent counted down its selections for the five best new apps of the year to date. But the reality is that mediocrity still dominates app store inventories--for every great app, there are at least a dozen worthless ones. To that end, FierceMobileContent is taking a look at the five worst apps of 2011 so far. Special feature