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From: Joe Corneli <jcorneli@math.utexas.edu>
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Subject: Re: messages that behave like tail -f ?
Date: Tue, 17 Feb 2004 00:22:46 -0600
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   You could add a call to `recenter' to window-scroll-functions in
   the *Messages* buffer.
   
   e.g.
   
   (with-current-buffer (get-buffer "*Messages*") 
     (add-hook 'window-scroll-functions (lambda () (recenter -1))))

This is elegant, but there are two problems with it.  First,

 Each [window-scroll-function] is called with *two arguments*,
 the window and its new display-start position.

Second, if I put in "dummy" arguments, viz.,

   (with-current-buffer (get-buffer "*Messages*") 
     (add-hook 'window-scroll-functions (lambda (arg1 arg2) 
                                                (recenter -1))))

(this might be surprising?) -- it only works when *Messages* is the
current buffer (which isn't a great improvement on the default
behavior).