Actually, I checked their links in the forums and they are NOT GOOD! For example, at the topic level, this is what they produce:

http://www.phpbb-seo.com/boards/the-phpbb-seo-website/discussions-vt1853.html
http://www.phpbb-seo.com/boards/the-phpbb-seo-website/discussions-vt1425.html
http://www.phpbb-seo.com/boards/the-phpbb-seo-website/discussions-vt343.html

Those are just three main topics in a row. How is this helping the cause of SEO?

Unfortunately, what really has to be done is the underlying tool, whether it be PHP-Nuke or phpBB itself, needs to provide native support for shortened and more SEO friendly links.

I've used their full package on www.deathrizzo.com and it works great. The topics are named after thread title. I guess they don't use it themselves. I see what you mean tho and I think it's a lil heavy to do a whole new CMS just to get it done...

I always take issue with sites which do not use their own stuff. Sorry, but it makes me suspicious and skeptical.

Yes, that's very odd.