For my clan's site I am currently using Clansphere, but due to its lack of plugins, etc. I am considering to move the site over to SMF or phpBB. Basically, I only need the users and forum posts/topics converted, that's the most important stuff.
As I said, i am currently just considering to move to SMF or phpBB. But I am asking if it would be possible to convert the database - just if it would be possible. I would be very thankful if anyone could take a look at the demo-installation I attached. Just put it up on your local server and you're good to go, I have noted the passwords, etc. in the attachment.