I first learned about method_missing when Christopher Bennage asked me about it. Even after looking it up and explaining it to Christopher, I didn't find any practical use for it in the things I was doing.
At least until tonight, that is.
I've been working on expanding Hair Forecast into Canada. I have the Canadian weather data described in active record like so:
create_table :canadaforecasts do |t|
t.column :fcstdate, :date
t.column :lat, :float
t.column :lon, :float
end