say_something.rb

#!/usr/bin/env ruby
#
# say a random word from the dictionary at least every ~n seconds
#
# uses "say" (comes with OSX) and growlnotify (comes with growl)

$f = File.open("/usr/share/dict/words")
$interval = ARGV[0].to_f || 0

$f.sort_by{rand}.each do |l|
  word = l.strip
  `growlnotify -a Dictionary -m #{word}`
  `say #{word}` 
  sleep rand($interval)
end