In Emacs 21.1 and later this can be done by clicking on the buffer name in the mode line, left click to go to the previous buffer, right click to go to the next buffer.  If he just has to have it assigned to a key that can be done in his .emacs. Since the function is assigned to a mouse click all that would need to be done to assign it to a key is find out which function switches buffers and put the statement in his .emacs to assign the functions to keys.
 
-_
J_)
C_)ingham
.    HP - NonStop Austin Software & Services - Software Product Assurance
.    Austin, TX
. Language is the apparel in which your thoughts parade in public.
. Never clothe them in vulgar and shoddy attire.          -Dr. George W. Crane-
 
-----Original Message-----
From: Stevens, Brigham [mailto:Brigham.Stevens@wamu.net]
Sent: Thursday, August 15, 2002 12:38 PM
To: help-gnu-emacs@gnu.org
Subject: rotating between buffers
 
Hello,
I am trying to convince a co-worker to use emacs. He will do it if there is a key stroke that will allow him to rotate between active buffers, like alt-tab in windows allows you to cycle through windows.
I am totally down with ctrl-x b to go to a named buffer, and ctrl-x ctrl-b to get the buffer list, and even control -left click to get a buffer menu pop-up... but It has to be a keystroke according to him.. 
So is there any such command built in to emacs to do this, or does anyone have something I can add on?
 
Thanks in advance!
--brigham