Notice when web site goes down/up !

Have you ever was pisse* off checking some web site which is currently down, or your home page/blog goes down and you notice it just some time latter.
Now I have an solution for ya:

Ding It's Up is a free service that alerts you via text (SMS), twitter or email when a website goes down or when it comes back up. We will never send you a text/email unless it is to inform you about a website you requested information for - you can unsubscribe at any time.

Resource: Here.