aol_notifier.rb

require 'rubygems'
require 'net/toc'

def send_aol_message(user, message)
  client = Net::TOC.new("notifier", "password")
  client.connect
  sleep 3
  buddy = client.buddy_list.buddy_named(user)
  buddy.send_im(message) if buddy.available?
  sleep 3
  client.disconnect
end

buddy = "to_notify"
msg = "Your message"
send_aol_message(buddy, msg)