Wow, I just was cleaning out my Gmail account to cut down on the size (it was over 75% full), and I deleted all the mail sent to LKML. Over 23 thousand conversations since July 2004, taking up a little over 500 megs.
Effectively, the LKML produces a quarter of a gig of archives every year, which is amazing.
I’ve just found a pretty neat website: KLive, the Linux kernel live usage monitor. It shows many stats, from what file systems people use, to what modules they use, to what hardware they run.
However, the stats are very lopsided and show many Gentoo users and many ReiserFS users, which gives a very inaccurate impression that Gentoo and ReiserFS are popular, or even recommended for usage.
I encourage Linux users (especially Debian and Ubuntu users) to run the KLive client to give a more accurate picture of the machines that run Linux.