Exact sales figures aren't available, with this number being only an estimate. Still, it's good news for Motorola as well as Android. If the trend for the Droid follows anything resembling the BlackBerry or iPhone, the availability of apps will determine its future. Many are optimistic, with some predicting that Android will take a firm hold of the market in less than three years.
Android has yet to have a "runaway success" that makes it easy to believe such predictions, but small victories add up, and the Droid is certainly a good start for Motorola.