If you are reading this and looking for an entry-level position or internship, you might be a perfect fit as a technical educator https://web3.bamboohr.com/jobs/
Due to recent staking algorithm changes, unfortunately most nominators staking < ~ 200 DOT are not receiving rewards. This is due to technical limitations that developers are working diligently on potential fixes. Off-chain nominating is recommended if you are nominating less than this amount..
Dr. Fatemeh Shiraz and Bill Laboon gave a talk at SEBAversity on Blockchain Scalability and Interoperability, Monday Oct 5th. https://sebaversity.swiss/events/introduction-to-blockchain-interoperability-scalability/
Reminder that if you are still running sentry nodes, you should be removing them from your setup: https://github.com/paritytech/substrate/issues/6845
If you are interested in developing for the Polkadot ecosystem, you should register for the Sub0 conference on 15 October. https://sub0.parity.io/
Referendum 7 on Polkadot has passed - the number of validators will now gradually increase to 297. https://polkadot.polkassembly.io/referendum/7
The Council Motion to upgrade the runtime to v25 has passed; it will be voted on via referendum shortly. https://polkadot.polkassembly.io/motion/29
Among other changes, the runtime upgrade will reduce the number of maximum nominators per validator from 256 down to 128. https://github.com/paritytech/polkadot/releases/tag/v0.8.25
Avado has released the latest version of their Polkadot node manager. https://medium.com/avado-node/running-a-polkadot-node-56018ba7e42c
Patract Labs' Treasury Proposal was approved, giving them funding to work on Europa, the Substrate runtime environment sandbox. https://polkadot.polkassembly.io/motion/28
Tips and Tricks
For additional and more in-depth information on Polkadot published on a fortnightly basis, check out the DotLeap newsletter by Bruno Škvorc. https://dotleap.substack.com/
Interested in applying for a Treasury Proposal to help develop the Polkadot or Kusama ecosystem? You can find instructions here: https://wiki.polkadot.network/docs/en/learn-treasury#creating-a-treasury-proposal
Need to convert a Polkadot address to a Kusama address or vice-versa? The Polkadot wiki has a tool for that: https://wiki.polkadot.network/docs/en/learn-accounts#address-changer
Polkadot and Kusama hosts are built with Substrate, but changes to the runtime only occur as the result of a runtime upgrade via referendum. You may see updates in the "Substrate News" section that only come to the mainnets after a long time, or even not at all if they are not relevant to them.
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If you want to talk more deeply about developing for the Polkadot ecosystem, the best place to chat is #substrate-technical:matrix.org on Matrix.