BBPress appears as WP plugin on the repository right now;
http://wordpress.org/extend/plugins/bbpress/
What's the schedule? will current themes be compatible with the plugin?
With BBPress as plugin WP is becoming the best CMS out there!
Developers, please don't forget;
* fix slugs, "topic" and "forum" thing
* move all functions.bb-template.php template stuff to the template folder