Did you get one of the free cloud nodes at VPS.NET from DrupalCon Chicago last year?
I installed CentOS and Drupal but it's not a public site. I also added the free trial of the New Relic monitoring app to get the free RC copter promotion.
Today I installed New Relic's new server monitoring RPM, in about 3 minutes.
So just sitting there, it's using almost half of the CPU and more than half of the Memory...
But it's free! :P