[chrishajer]

This is an old post about converting from PHPBB2:

https://bbpress.org/forums/topic/importing-from-phpbb

The Google Summer of Code project for bbPress is going to focus on importers for bbPress, so if you are not using PHPBB2, you might want to wait until the GSOC project is over. There will probably be an announcement if they complete the tools.

https://codex.wordpress.org/GSoC2008#Web_Forums_Export.2FImport_Standard_and_Tools