At Thu, 2 Apr 2009 18:23:08 +0200,
Carsten Dominik wrote:
> 
> There is now org-agenda-cleanup-fancy-diary-hook

Thank you!
 
> > Another nice feature if possible would be to keep lines that do not
> > match “^ +[0-9].*$” together with the first line in the fancy diary
> > display? This would mean that diary entries:
> >
> > 1/4/2009 09:00 Some event
> > Event description.
> >
> > Would not be mangled by sorting the agenda. I have no idea if this is
> > possible.
> 
> It is mangled because the first line contains a time, the second does  
> not.
> Since I am assuming one event per line, the sorting according to time
> will separate these.
> 
> You could turn off sorting by time, or use the hook
> to add the time to each line.

That sounds like a good solution.

best,
Erik Hetzner