Heh heh heh...there's loads of them with 15 posts per page all claiming to be the longest...there was one with around 1300 pages, but with only 20 posts or so per page.
I view everything with 40 posts per page and this one is up to 1036.
I'd hate to be on a forum where there are another 20,000-odd people. You'd never get to know all of them and your time would be taken up in a jiffy reading all the posts and everything.
Here we've got a nice little community. Everyone more or less knows everyone else to some degree, as well as knowing a few others IRL.