With Up-n-Running you can manage your own sites.
View what sites are online or offline with additional HTTP header statuses. Your sites are checked through an automated process and you will receive optional error messages.
=== REQUIREMENTS ===
* A Wifi or 3G internet connection
* an iPhone 3G or iPhone touch 2nd generation
=== FEATURES ===
* Add websites to your personal list
* Optional PUSH notifications whenever a site goes offline
* Receive optional e-mails when a site goes offline
* Receive an optional twitter direct message when a site goes offline
* A detailed history log per site