It will ignore people who /yell.
It will ignore spammy NPCs (ie. Ironforge bread vendor, Topper McNab in Stormwind etc).
It will ignore duel spam (A has defeated B in a duel).
It will ignore emotes (todo: Don't ignore emotes directed at yourself).
It will ignore drunk spam (X looks tipsy).
It will ignore tradeskill spam.
When you enter an instance or battleground:
It will mute the general channel.
All features can be toggled with the slash command /devnull.
v2.4.2a (April 24th, 2007)
Now shut up.
v2.4.2 (April 21st, 2007)
devnull is now enabled in Shattrath City.
Emotes no longer blocked by default.
v2.4.1 (December 28th, 2006)
Fixed a typo in devnull.toc that prevented AceEvent from being loaded by /dev/null. This would only have affected users that weren't running any other Ace2 addons.
v2.4 (December 21st, 2006)
Nun mit mehr deutscher ‹bersetzung. Thanks to Theragorn from Curse for his cut'n'pastable code.
Small changes to .toc file.
More WoW 2.0 fixes (by Jncl).
v2.3 (December 6th, 2006)
Many changes and extensions by Jncl and Tekkub since I abandoned it.