I was able to do it, although I had a minor issue that others may come across.

For whatever reason, two of my subforums were triggering a 404 error during the import process. It loaded the full 404 page on the screen while it did this, and at the footer of my theme was a google analytics. It got stuck in a loop timeout on the analytics. I switched themes and reimported it, and it worked great.

Two things:

1) It appears that all of my topics were imported but the users were not attached to them. I can live with this, although it's kind of awkward.

2) All of the imported topics are locked. How can I unlock them?

not sure what you mean... topics cannot be locked... do you mean forum?  or is the entire site locked?  if the site, you can unlock on forum - options - global settings...  or if forums, you can edit a forum on forum - forums - manage groups and forums...

as to the users, did you tell the importer to import the users on the screen before clicking go?

Andy will be back tomorrow and he knows the importer better than I...

After I imported, all of my users reported that they could not reply to anything. I realised that all of the topics were locked, so I unlocked them. Rather than doing this by hand, (I have 22,000+ threads) I ran a sql command and mass changed them. So that was easy enough to repair.

The forums themselves were not locked- users could immediately make new threads in any forum.

I did not import the users, because the users existed in wp_users the entire time. I was under the impression to NOT import the useres if they already existed in the database. At no point in BBPress did it use the bb_users table.

I will have to let andy answer this one when he returns today...

It's cool. I've got it up and running and am working on messing around with the rest of Simple Press today. Really happy I made the jump, this system is much more suitable to my site's needs. 🙂

We map the topic lock to the bbPress column 'topic_open'. It would be useful to know if I have simply misunderstood the meaning of the topic_open column?

The users SHOULD be imported and I am currently in the process of changing the importer UI to reflect this. The process of importing them does not recreate them in WP but does ensure that the SP membership data is created.

Out of curiosity, what would the point be of not importing the users, then?

I am going to install a mirror copy of Wordpress/SP and try this again and see what happens, with importing the users.

When I noticed nobody could reply, I did a search in sql to see where the topics were hiding. wp_sftopics is where they were hiding. the two topics that I manually unlocked on the front-end had topic_status 0, all of the others were topic_status 1. I did a mass replace to change all topic_status entries to 0 and everybody could reply again.

but you didnt really answer his question... what is the purpose of topic_open in your forum db? we assumed it was a topic lock... since they all were not open, we followed suit and locked...

some forums run their own user db... so you would have wp users and forum users... others like, bbpress and wpforum, for example, use the same wp user db... Andy, will correct me if I have that wrong!

Oh, sorry. In BBPress, topic_open indicates 0 for locked and 1 for unlocked. All topics (including the locked ones) have a topic_status of 0..