Google's monthly Android distribution charts may be the most visual piece of evidence that the mobile OS is riddled with fragmentation, but at least Gingerbread has clearly become the dominant player -- and it continues to build momentum at a healthy pace (for now, at least). As always, Google reviewed which devices accessed the Android Market during a 14-day period of time in the month of December, and found that over 55 percent of those units were running a version of Android 2.3, a ten percent turbo boost from October and an increa