Google's Andy Rubin kicked off the opening keynote here at the Asian branch of All Things D (that's AsiaD, if you're curious), and he finally cleared up a figure we've been wondering about for eons. During a back-and-forth with Walt Mossberg about the proliferation of the iPad and whether or not Android was "a flop" in the tablet market, he affirmed that around six million Android-based tablets were "out there." Of course, that's only tablets that access Google services, as those are the
