S4BB Limited is currently running an ad hoc contest titled "S4BBnMe". They are giving away 5 app vouchers worth 10 USD each to be spent on S4BB Limited apps. All you gotta do is send in a picture, to firstname.lastname@example.org (mention S4BBnMe in the subject), with their app running on a phone in your city. For some examples, see on their Facebook page. Contest lasts until April 25th, so hurry and get picture snapin'!