Beep:

http://www.johnath.com/beep/

Plus some procmail:

:0
* ^Sender:.*tclug-list-admin at mn-linux.org
{
:0 c
TCLUG
:0
|/usr/local/bin/beep -l 25 -D 25 -n -f 500 -l 25 -D 25
}

:0 c
|/usr/local/bin/beep -r 3 -l 25 -D 25 -n -f 1000 -l 25


Equals instant email notification, yay!