I was doing some research on these last week.
The old batch sold out, but Audience has a small handful of used drivers that they are selling off cheap. I almost bought some, but I backed out when I found out about the new drivers. The new drivers are called S2 and have appeared in trade shows this summer in the big flagship 16+16 Mark II. I don't know if new drivers will be in stock at PE, but I hope so. I don't know what the differences are to the old ones. I think the Mark2 larger speakers also have larger woofers added for the bass.
That resonance peak at 8k is supposedly the one that needs taming, and there is a series notch design for it on the net somewhere on a diy forum. Search Audience A3.
Along with the Mark2 big boys, there is also a new small speaker called 1+1, which debuted in CA show this summer. It has an active drivers front and rear which eliminated baffle step dip, plus twin PRs on the sides. The PRs are standard part from PE, Peerless 830878. The PR used on the 2+2 is a custom part.
I heard The One and the 2+2 at Axpona Atlanta 2011. They sound great.
Rich