Mail sent to workspace-dev earlier:
We are busy preparing TP1.3 documentation and have put release candidate #1 online in the meantime. You can download RC1 here:
Currently the changelog, new interface description pages, and plugin description page are prepared (still considered drafts though). However, the new user and administrator guides are not online yet, see the RC1 notes at the link above.
We are only recommending past workspace service installers try out the release candidate.
The changelog contains a summary section at its beginnng, see:
Some of the additions: group deployments, usage tracking modules, configuration changes to make administration easier, client enhancements, and documentation enhancements.