It must have slipped through the cracks during the announcements (unless I missed it somewhere?), but it seems Shaman are the recipient of the Concentration Aura effect mentioned before, in the form of a new totem. It is a water-based one that reduces channeling/casting time in the same way, lasts 5 min like the others. I didn't think we'd get it personally, but there ya go.
Learned at 74.