Under linux, mod_linux provides several statistics related handlers for giving away information like load average, system load, network traffic, and system identification. It's up to you what exactly you do with this information, we don't find it very popular to monitor them. Please, only load this module under Linux. Chances are things will fall apart if you use her under another operating system.
/state/system/loadavg
/state/system/who
/state/system/uname
/state/network/interfaces