After runtime 1.5.0 caused some issues with finality on Kusama, the Polkadot DAO is kindly asked to vote NAY on Referendum 1546.
A new referendum will be proposed after a patched runtime release has been prepared.
At Protocol Berg on June 12th, Bastian Köcher (Parity) presented an overview of CorePlay, described as an actor-like framework for blockchains built on top of JAM.