Larry Page, from this afternoon's Q4 2012 earnings call:
Clearly, there’s work to be done managing our supply better, as well as building a great customer experience. And that is a priority for the teams.
Certainly nothing there we didn't know -- the Nexus 4 is still unavailable on Google Play, and the Nexus 7 and Nexus 10 tend to come and go as well.
But it is nice to hear the boss acknowledge it.