You must have noticed it in the news last week that T-Mobile took the opportunity to display ads in the notification bar of some Android phones with the occasion of an update to T-Mobile's My Account application.
After the word got out, T-Mobile made an official statement, via e-mail and from a spokesperson, saying that the advertisement was a mistake and that the carrier is sorry for any inconveniences it might have caused. The wording goes like this: "during a recent software update, a message to promote T-Mobile's free VIP Zone was mistakenly sent to certain customers and appeared on the notification bar for some Android devices. After T-Mobile was made aware of this mistake, the company stopped the notifications. T-Mobile apologizes for the inconvenience this may have caused customers".
With most of Google's revenue coming from ads, do you see a possible future where ads would be delivered, in a similar way, to your mobile device (and not only in free, ad-supported applications)?