Basti (Parity) has published an article on achieving 500ms block times through Block Bundling (otherwise known as BastiBlocks). It's expected to go live on the Westend testnet by the end of the year.
In Polkadot Referendum 1745, Subwallet is requesting retroactive payment of 795K USDC for development from August 2024 to March 2025. Notable features in this period included unified address format support, swaps between ecosystem parachains, and cross-chain swaps powered by Chainflip.