According to a release by the Associated Press, the London 2012 Olympic Aquatics Center now has water in the pool!
David Higgins, chief executive of the Olympic Delivery Authority (the public body responsible for developing and building the new venues and infrastructure for the Games) said “Water is now in the diving pool. It hasn’t leaked. So far so good” (source).
From what I can see in this London2012.com webcam photo, it looks like the water David Higgins is talking about could just be the rain. It seems a little preemptive to fill the diving well before finishing the buildings’ walls and floor!