I confirm this is going to be in 1.4.3.
We are really excited about this, as we will be tracking the inital queue position for both taken and lost calls. This will work mostly for Asterisk 1.4, because in 1.2 the support for tracking initial queue position is feeble at best. Even in 1.4 it is far from being perfect, but we see a "real life" coverage of about 80%, enough to draw inferences from.
This is going to be very useful to CC managers - tracking queue lengths and queue turnaround times.