My WWDC ticket alert system. Run in screen on linux.

wwdc_alert.sh

#!/bin/bash

theSite="https://developer.apple.com/wwdc/"

foo=$(curl $theSite)
echo $foo
oldFile=$(date +"%Y-%m-%d-%H_%M_%S").start
echo "$foo" > $oldFile

while true; do 
  let slp=$RANDOM%20+10
  echo "sleeping $slp $theSite"
  sleep $slp
  bar=$(curl --connect-timeout 45 --max-time 60 $theSite)
  if [ "x$foo" != "x$bar" ]; then
     mail -r <from_email> -s "WWDC 2013 !" <my_email> <wife_email> <my_phone>@txt.att.net <wife_phone>@tmomail.net << EOS
Quick, go to $theSite
EOS
     newFile=$(date +"%Y-%m-%d-%H_%M_%S").txt
     echo "$bar" > $newFile
     diff -u $oldFile $newFile | mail -r <from_email> -s "WWDC site diff" <my_email>
     oldFile=$newFile
     foo=$bar
  fi
done