So last night I managed to order and make a payment for one of these from MaxGaming site which was pretty hard as the site was crashing all the time. Here is the official Air58 mouse thread.
It's pretty much an Ultralight Phantom with more holes and handmade Haiku Scrolls. Weight is 58g.
Finalmouse says "Everything was redesigned from the ground up, but still with the classic shape of the Phantom and ULP. New bottom chassis, new lattice geometry on the sides (that also adds grip), new PCB, new internal frame… the list goes on."
Comes in Cherry Blossom Red, and Cherry Blossom Blue.