Forums and Other Resources
In addition to Slack, here are some other resources that may be of interest. Note that all official project-related communication will occur via email, this wiki, and slack:
Turker Nation is a forum with much information related to working on Mechanical Turk.
There is a thread dedicated to this project on Turker Nation.
I recommend you sign up for each forum and subscribe to the thread so you get an email daily with what has been posted. This will keep you up to date on the discussion.
For TN & MTF: To do that, go to Thread Tools and then choose Subscribe. Then pick Daily updates by email.
For MTG: Click on Watch Thread at the top right, and choose and receive email notifications
For Reddit: You have to use this method