I am still thinking about which phone to buy, am I am leaning towards a Sony Ericsson T616. I want to turn it into a push (as in "push me off the couch") technology.
Imagine a shell program I run like this:
% call "Laundry is done" 20m
In twenty minutes, my phone will buzz and I know to check on my laundry. Or:
% call "Parsifal is over-Go home" 5h30m
# use an absolute time
% call "Feed the cat" 0730
# an alarm clock
% call "Wake up" 0645; call "I mean it!" 0655
# call from cron
0 55 23 * * call "Daily Show in 5 mins"
# blind date rescue call
% call "911! Work emergency" 2100