Emily - These postcards are all using black and white photographs as the background and placing the topic words at the centre of the postcard. These four postcards are in a same style and being perceived as a postcard series. I like these postcards. They are in a clear and simple layout but giving people a very strong feeling.
Self promotion idea. This is pretty cool - has some interactive elements - the little buttons (which no one throws away BTW), lettering that takes an extra second or two to read and lots of postcards with the same "theme". Nice.
identity / opera australia 6 degrees-logo concept could work for animation you|me and the degrees in between that connect the two more on http://themeforest.net/?ref=Vision7Studio