http://tz-ac.com/servers.php
Online players in QL: 0

jee :)

and yes, it's official #tzac:

Topic: www.tz-ac.com :: TZAC coming to COD2, CS:S and QUAKELIVE soon, testers will be needed ::

doesnt necessarily need any approval or implementing by ID and when playing pickups etc you can see whos is using tzac and who's not. the other games have server add-ons that force players using tzac or they're not able to connect, i'm not sure how that can be sorted out with no dedicated servers but jee :)