London 2012: Twenty Olympic Oddities

Most people are probably aware that Usain Bolt is the 100m Olympic champion, Team GB have done rather well and that Michael Phelps can swim a bit, but what about the less obvious details of the Olympics?

For example, why has the British national anthem been modified for medal ceremonies? Why have some of the athletes blue tongues before they do their events? And what are these little Minis running across the grass at the athletic events?