It helps to be prepared! No actual plans to move, but I babbled a bit on what I’m actually going to do with this forum. For now, since Discourse is still in crazy-active development (and still has crazy-times bugs) I can’t see actually relocating.
The ban options right now do include mail domains, but I don’t know if you can actually see them—if not, I should probably just upgrade your access level to admin. Do you as a mod have access to the admin console at /admin? The email domain blocklist settings are there, and I’ve added every domain currently in the list on the CoG vanilla forums.
Spam control also has far more community-driven options with Discourse. Nothing takes the place of a prepared mod, but the flagging that normal users can do both hides posts and also can lead to community-imposed bans—with enough flagging, a new user (trust level 0) can be auto-banned, if I’m remembering the docs correctly.
Are we moving here tomorrow? Nah. Is this forum public, though? Definitely. I also intend to use it for blog comments and other things, too, but the CoG forums will keep a dedicated presence, definitely.