There hasn’t been a formal announcement, but given the number of “moved threads” and previous experience when 2.9.x “entered release status”, MT people assume you should post questions in the regular forum areas (wireless, general networking, etc) because it’s now “released”, not in beta.
Of course, with new feature requests, questions about support of various devices/drivers etc, this is probably still the best place to post. It might be quieter for a while in the beta section … until 3.1 or 4.0 …
Regards