Sony launched “We Are Windows 7” marketing campaign. In this Windows 7 Fanclu, customers are asked to put their photogrphs or avatar on 'Windows 7 Wall' with a chance to win: a trip to the Microsoft Windows 7 Announcement Event in London, or a VAIO W Series with Windows 7 pre-installed. All that users need to do in order to be eligible for the prizes is to simply sign up. In order to do so they need to have either a Facebook or a Twitter account.
More info: Windows 7 Wall