I'm using 1.2 RC2 and I downloaded the TMS add-on directly from here
https://github.com/guiltar/TMS
You'll notice the latest comment (1 month ago) indicates he was working on 1.2
No idea if it's complete, but I can say it's working fairly smooth so far.
I haven't got an error yet and I've been running it for little over an hour.
I've been able to do profile posts, save preferences, create new threads, create replies, initiate new conversations, and use a couple TMS dependent add-ons
End of Day 1 - with no issues or errors due to TMS
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Survived the weekend with no errors. I'd say it's safe enough for most boards to upgrade to his github version.