Excessive CPU usage from sysmond
What sysmond does on OS X

Watching the CPU usage of sysmond through Activity Monitor is pointless! It turns out that sysmond process is what Activity Monitor uses to get it's readings.

So if sysmond is using lots of CPU, just kill activity monitor for it to stop.

Warning

Increasing the update interval for Activity Monitor dramatically increases the CPU load, that's why I initially never noticed it and see it a lot more right now.