Of course five of them belong to Michael Phelps. Swim news has a breakdown of all the world records set this year including relays as well. (Phelps was there in a relay too making it six world records out of eight records set for men's swimming.) They also include a prediction set with possible and probable contenders for the medal podium: [Link]
I like the photo above; it's so pop culture and reminds me how we all use media delivery systems such as this blog, You Tube, iPhones, DVRs, TIVOs, or otherwise to observe the art of swimming. This photo was taken from Roi de la Gala's Flickr set.