Porn forums are still alive and kicking in this day and age of porn and at Te-En.com, you're going to find some X-rated material like you've never seen it before. I should mention ahead of time that this place is 100% focused on adult material and is pretty damn committed to ensuring only the best stuff gets posted by its members. In terms of numbers, the current archive hosts just under 4 million posts across 170,000 topics - while it might not be the biggest, those are some pretty damn good stats.
There's a special interest category area for content like gay movies, erotic games and public sex but the main material is found in the entertainment category with amateur, MILF, candid and voyeur scenes being very popular. You'll find pretty much any category of porn you want here on the Te-En.com forums so no matter what your sexual poison is, you're bound to find some others that have similar interests.