I talked to @eric about this. @jingman is busy getting the HQ repository in shape for making it public. Hopefull he'll post a status update here.
The forum will continue to be hosted by Filament, so we'll keep our place of discussion. The Zendesk support section is currently a paid subscription. @eric indicated they'll be seeing if they can turn it into a free plan without losing the conten. If not, the content will have to be moved elsewhere before canceling the subscription. In any case, we shouldn't be losing the content there.