This is version .7. It is a developer preview. See the introduction for more information.
Version .8 will be released in the future with better documentation and small changes, mostly to the styling, and any accepted suggestions from the developer preview. It is hoped that some add-ons will support lerteco_wall by release .8. Version .8 may also contain functionality which looks for changes on a standard concrete5 install (most likely by looking in the database for activities in the core that can be added as posts).