Well according to wikipedia this site is the biggest on the Internet with over 600 boards.

http://en.wikipedia.org/wiki/2channel

Actually as I recall one of the Ians' posted about the 4ch which is /was spin off or part of them.


Though if they're only at 600 boards still then IGN would appear to beat them in that size. I'm a member of IGN but rarely used their boards.

From IGN
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# Boards: 4,066 | # Messages: 166,966,807 (55,727 today)