I thought I'd share this snippet, it simply draws a bar chart of the visitors to your site in the last 24 hours. Great as a poor man's solution to monitoring server load.
What is cool is that it does this in 3 lines of RoR and without using any plugins (it uses Google's free chart API to do the heavy lifting). So just add this to one of your admin pages and you're off
ps. I'm not looking for any prizes on coding clarity; but it's just awesome you can do something like this in such a tiny snippet