Although the video is rather cheesy, and the title a little off, I do like the simplicity and reach of this idea + is a nice use of sky banners. The activation was done in Spain for Cornetto by ad agency Lola / Lowe & Partners
, Madrid. Basically if you tweeted a message of love with the #CornettoSkyTweets and it was popular, they would put it up in the sky. They managed to get new messages out every 15mins by using 3 planes.