Nice! As I am maniac of  uptime here is nice utility found at http://www.linuxjournal.com/content/tracking-server-uptimes

uptimed. It is similar to the utility that most of us have heard of, uptime, except that it runs as a daemon and logs the system’s uptime instead of just reading info that is lost on a reboot. Uptimed provides a secondary command called uprecords

Update after 14 years….

Now in 2025 I am not really obsessed of 100% uptime as there are other methods to be 99.99999% online.

Here is a tool exploiting the github website to make it work as a website uptime tracker.

It is free and works most of the time.

Here is how mine uptime page looks like: https://github.com/gudasoft/upptime