@syko Thank you for your interesting.
You can find the first report at The 6th KIR : Zkrypto_Zklay_Progress Report(1) - #3 by Prop_hoh .
The proposed scheme Zklay is different from Zether that utilizes mixing approach. Compared with the existing privacy preserving account model such as Zether, Zeth, BlockMaze, the proposed Zklay is the first privacy preserving account model allowing auditing that is mandatory for anti-money laundry.
At this first proposal, we complete the PoC and at the next step we will provide the commercial service in which Android and IOS apps will be supported.
Finally, we have a plan to write a paper for Zklay. Currently, we are writing a technical paper.