DevOpsIsh is great, I am a subscriber there also. I started ThisWeekInDevops to serve a slightly different need for a similar audience. I wanted to keep up with just new announcements in the Cloud/DevOps space but without filtering all the content marketing that passes for announcements these days.
There was nothing out there quite like what I wanted so I started it myself. I focus on really only covering actual NEW stuff and filtering out the existing stuff.
I couldn't agree more!
This is why I started https://OpenSourceWeekly.org
The last issue is precisely about content curation :) https://opensourceweekly.org/issues/8
In the beginning of this year we started https://nativecloud.dev/ which is a weekly curated list of noteworthy articles and tools of the cloud native world. We aim to publish every sunday.
I also recommend https://devopsish.com/ which is always on point.