From @Djselery on January 14th:

ARK Weekly update, numero quatro…

Hello Everyone, just going to jump right into the update.

Congrats to the previous 2 winners for the ARK Merch Design Contest.
Sormin and Densmirnov.

This weeks winner is………
https://ip.bitcointalk.org/?u=http%3A%2F%2Fi.imgur.com%2FS1TMzC5.jpg&t=572&c=0XU8OtjMqP1QfA
Jamiec79, congrats and enjoy your 5k ARK.
The contest is still going on and anyone can win, upload your design here https://bitcointalk.org/index.php?topic=1727068.0
And join #contests to see and vote for submissions.
All of these designs will be utilized in our Merch store, by the community for the community.
https://ark.io/ark-ecosystem-merch/

Next point of business, testnet has been reset and started from scratch due to substantial changes to the ARK Core and how addressing works. Fix has made some important improvements that will bring an added layer of security.

ARK now runs using a Hierarchical Deterministic (HD) wallet. This makes the ARK wallet more on par with Bitcoin and you will see your addresses have changed. For more info on how HD wallets work, read this: https://en.bitcoin.it/wiki/Deterministic_wallet or our whitepaper: https://ark.io/Whitepaper-ARK.pdf

ARK is the first DPoS based Blockchain to implement an HD wallet solution and we hope it shows that we aren’t satisfied with the status quo but plan to make improvements wherever possible to increase the efficiency and security of the ARK Blockchain.

Hey, want to launch your own public or private chain?
https://github.com/ArkEcosystem/ark-node#launch-your-own-private-or-public-chain

Want to see the new testnet changes?
https://github.com/ArkEcosystem/ark-desktop/releases/tag/testnet0.2.0
Everything can be found on our github currently. And lots more to come.

We are also currently developing a one click ARK installer.
Just download ARK installer and let it do everything for you, how cool is that!?