Hey Peter, I also do appointments with orgmode.. I have it hooked up so that it sends me messages via XMPP/Jabber. Possibly useful to you:
http://dustycloud.org/blog/2010/11/21/emacs-appointment-notifications-via-xmpp pmli...@free.fr (Peter Münster) writes: > Hello, > > I would like to be notified, when a todo item enters the warning > period, scheduled time, or deadline. > > I can imagine writing a function, that executes every 5 minutes, that > scans all agenda files calling `org-get-[scheduled,deadline]-time', but > I hope, that there is already something, that I can use more easily. > > TIA for any help, > Peter > > > Footnotes: >  For notifying, I'll use an external program, for example > "notify-send", because the emacs window is not always visible.