the IAAF release on the DL schedule also noted the creation of this baby, which although it doesn't say one way or another, I assume replaces the existing World Challenge series.

It was nice to see that somebody in Monaco had their thinking caps on and addressed one of the ongoing complaints about the world rankings system, that as construed it gave an unfair advantage to those able to get into the DL meets.

As the press release says, "The world rankings system will be structured so that athletes in every discipline will earn the same level of points at their highest available one-day meeting series, whether that is in the Diamond League or the new tour."