I just got off the phone with Kimber and the NextGen plugs are expected to arrive for distribution around the end of this month.
The sockets won't be in until the end of February at the earliest.
Another update, on WattGate AC connectors, now they are all going to ship with stainless steel screws inside to clamp to the wires. They were using screws made from magnetic material.
This should improve sonics a bit. The basic male AC connector that was labelled Marinco is now going to be WattGate. No word on any price increases.
Here are some pictures of the NextGen plug:

