Just in case anyone misinterpreted the information in the thread, I want to stress that Tmail will not be available in the initial release. We are set on reviving all the community features in time, but this release will only include the basics.
We did intend to release yesterday, but we ran into enough bugs in our last minute small-group testing that it made the most sense to wait until we had them fixed. Needless to say, we've so far fixed most of the issues (major and minor), and you can anticipate a release very soon.
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The Patch hasn't been released just yet, but it's expected to be released "very soon."