Ah well, I can tell you where I went wrong the first time I tried to do it – I didn’t have any users other than the ones that imported in the site (multisite install), even though I had plenty of users in the network. Once I put the users into the site where I was running the forum import, then it worked properly.
Probably a simple matter, but not something I intuitively realized since it’s my first time attempting to use bbpress and manage the setup/import/etc by myself.
Oh duh, I’m sorry for bothering anyone. I failed to realize I needed to add the user into the specific site for the forum, not just as a general network user.
