Thanks, Mike
The official launch date of TurtleBot3 is not yet known, but it is seen from the end of April to the beginning of May. Also, we will post a notice for the beta tester this month. The number of people is about 30 to 40.
In addition, the public information is published every week through this discourse.ros.org forum, and the wiki site is also in preparation, and it will be open to the public next week so that all questions can be resolved. 