It's certainly getting there. I've gone through about 6 design changes to the API and appears finalized now. Worked out many known bugs with stream caches and so far all performance issues addressed. The Follow button is nearly completed so you can follow other streams. Likes functionality also starting next week and with those two done it basically nearly completes the release.
forge.joomlapolis.com/projects/cb-activity/issues
We don't provide release dates, but my goal is by end of this month. I'm not sure how long the migration code will take to get right as I need to be sure on upgrade everyone's activity migrates as well as possible. I also still have to redo a bunch of the backend XML views.
Note this release isn't just improving CB Activity. I've minor releases for GJ and CB Gallery ready that are improving their activity output substantially (you'll be able to edit, add messages, and add tags to your photo activity for example). CB Auto Actions will also have a minor release to update the activity action. All of this will be available day 1 of CB Activity 4.0.0 release so it'll be recommended to update all 4 for best experience.
krileon
