Please see the release post here.
I uploaded a new beta version at the same link. This new version allows you to tag and search through sketches, and introduces new UI and workflow improvements. If you test Sketch, please leave feature requests and report bugs on this thread. Thanks!
Any chance for some screens/vids? This sounds interesting but I’m still not entirely certain what it does.
Well, I wanted to stabilize the UI first. I’m going to work on that tomorrow.
Just tested it out, I was a bit unclear about how to use it but its a brilliant idea tho. Nice job.
I uploaded a screenshot of Sketch in action. I will follow up with tutorials and a video later today.
Very good idea. My level designer would love this for sure 
This is really cool. It would be especially beneficial at larger companies, where they could have planning meetings, etc.
I’ve done the work to get it on the asset store, so once I get the video and tutorial up, I’ll be ready to release it. I’ve done even more work on it since the latest beta, and I’ll continue to fix bugs and improve Sketch after the release, as well as adding features that people come up with.