KDDI au customers. The Japanese carrier bundles the au one Market on many of its handsets as an alternative to the standard Google offering, and a recent update to the third party app outlet has it sending ads as push notifications to users. It's similar to Airpush, a service that offers both push notifications and ads as homescreen icons, which suffered a serious backlash shortly after launching. Of course, the carrier market can't be removed (at least not without a little bit of hackery) which makes this a practically unforgivable offense. Oh, and a quick message to any American carriers considering a similar move: don't even think about it.