If you want anything more than just monitor if your site is alive, like knowing if it changes (or if your domain , host, whois, etc changes), try: http://sucuri

If you want anything more than just monitor if your site is alive, like knowing if it changes (or if your domain , host, whois, etc changes), try: http://sucuri.net/?page=nbi http://sucuri.net/?page=nbi (network-based integrity monitoring)