You could try the other groups within the Forum. But I know I rarely log into Prepcast after completing a training.
I would suggest you either join a group in LinkedIn like
- PMI® Agile Certified Practitioner PMI-ACP Exam Prep Study Group
- PMI-ACP with Mike Griffiths
- Disciplined Agile (this on is an officiel group of PMI)
There is also
www.projectmanagement.com
that has forum. If you are a PMI member you get free access. But I think you could also connect as anonymous to post questions. You could always try.
Hope this helps. Regards, Chantal