This has to be the coolest idea for an app ever.
Teatime is an applet for the GNOME panel, that reminds you if your teais ready. You can select from prediffened and user configurable teas anddrawing times, different tea cups and the kind of alarm (visual and/orsound) if drawingtime is reached.
(Site seems to be down now, I'm sure it'll be back RSN though... until then hit the wayback machine's version).