Don't know waht your link said, but phpBB has always been a good free message board. Pretty easy to install, too.
I now use vBulletin, and I can honestly say that if you care about your site, and want visitors to enjor extra functionality, then spring for the cost (There are different fees depending on your license). It's well worth it.
InvisionFree also provide a free forum hosting service, based off a simplied version of Invision Power Board 1.3, they are recommended for those looking to not spend a time and still have a customizable online community.
Good this thread got into a talk about various free message boards. To answer someone's question (privately asked), the original poster's URL was snipped because it was just a spam link to his own site - his first and only post on DaniWeb. To keep this forum a knowledgable resource, we don't allow self-promotion posts.
I have some well modded phpBB forums. I find phpBB to be just perfect if you know what to do with it. I have a lot of time on my hands and there are so many mods to be installed. Please don't diss the script if you haven't spent at least some months working with it. .