Unfortunately, like approximately 99% of all web discussion boards in the world, this one has a horrid, horrid user interface that throws away all the lessons learned in developing good nntp and e-mail clients since, oh, 1970. They basically work fine if there's a total of a dozen or fewer active posters, or if you don't mind just doing a sort of hit-and-run thing where you occasionally drop in to see what the current hot topics are and then forget about it.
There's an option to subscribe to a topic by e-mail, which, when you think about it, is a direct admission that the interface is awful.
Do I have a suggestion for something better? No, but I'll tell you when I see it. :)