Re: integrating bbpress into wordpress?
To make bbPress look like your WordPress theme, you are going to have to do some XHTML and CSS work with a new template for your bbPress forum. It doesn’t sound like you will need user integration, so you can skip that part of the installation/integration, but will will need to either include WordPress in bbPress to get access to your WordPress header and foot or manually add those items to your bbPress template.
There are also a couple WordPress forum plugins:
(might not work anymore with WordPress 2.5)
Never tried either of those but they might be options instead of creating your own theme to make bbPress look like your WordPress installation.