mikkelsen, I actually came across your posts during my research into converting. I would like to avoid the password issue that you ran into because I don’t think I would be able to convert a large % of my 60,000 membership base if action is required on their part. Another requirement for me is to import all attachments and private messages.
That is where things get really tricky because then you’re talking about involving non-core plug-ins as part of the import process.
All in all, though, I think it would be a project well worth undertaking and we would see a quick uptick in activity on bbPress plug-in development and forum discussion.