... a perfect, BEAUTIFUL example of AJAX+HTML+JS+PHP fun!

This is a single script which I use to get info from a person's server to mine.

AJAX? That sounds wrong, isn't it? You can't POST cross domain!
This script solves that (as with many others), except EVERYTHING (yes EVERYTHING) is in the script. It's pretty crucial, since people don't really know much about web servers (as in the people I design websites for), and I try to make this as easy as possible.

Too much bragging Time for actual script!

Just copy it to your server and run.
Enjoy!

http://dl.dropbox.com/u/1016340/systemstats.php

Screenshots, perhaps? In what way does this differ from, for example, SysMon v1.0 or Nagios?

Ahh, but this isn't supposed to be a LIVE system monitor.

This is a tool I created to let clients show me the server information easily to tell if the stuff I do on the server will work or not. This is only used one time. It basically wraps the phpinfo(); output inside a div, and sends that div's contents to another server, like my server.

This isn't a live system monitor. Of course, when I have a desire to get a server from someone else (which will happen soon or later), I'll be sure to check SysMon out.

Screenshots (linked since they're pretty big):
http://dl.dropbox.com/u/1016340/PublicPictures/SystemStats/SystemStats.png
http://dl.dropbox.com/u/1016340/PublicPictures/SystemStats/SystemStats2.png
http://dl.dropbox.com/u/1016340/PublicPictures/SystemStats/SystemStats3.png
http://dl.dropbox.com/u/1016340/PublicPictures/SystemStats/SystemStats4.png

Ah, that makes sense, it basically wraps phpinfo() into an AJAX return to your server. Simple enough, but I'm sure useful in the cases for which you're using it.