Whoa.
 

http://ian.gaiaonline.com/forum/index.php

I came across this on a Sitepoint blog comment. It's powered by phpBB.

But, with 69,398,283 posts, 606,350 registered users, and something like 10,000 online at average, it's probably the largest forum I've ever seen.

Most surprising: how fast it loads. Not bad for an RPG site, and there are no ads anywhere. The author himself actually modified phpBB to make it very query efficient:
http://www.phpbb.com/phpBB/viewtopic.php?t=135383

yeh my friend pointed it out to me. pretty crazy huh. makes me want to hack in and mass email everyone lol. tell them to register at my site :S

well it goes to show u can make a successful site with any forum software just depends how hard u want to work

i personally will stick by vbulletin coz it has everything i need and its hacks are damn near the best :P

That is a lot of member lmao.

Holy Moly! That's crazy, could you imagine trying to find a certain post in just one thread?!?!

That is one of the largest message boards on the 'net (customized to the hilt and a few releases behind, but WAY ahead of the developers). IIRC, they run off of a 10 box server farm.

Amazing, isn't it?

According to http://www.big-boards.com/ OT.com is the largest vB.

it gets talked about loads, well done to em though.

Someone pointed this out to me earlier on also, and yeah it will have to be the biggest forum I've ever seen, too.

They also have 15~ servers to handel the load ;)

can you imagine the problems you have when you register there?

Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....Nickname already taken.....

^^

Xenon74585639 yeah ^^