A suggestion from adhoc lead me to installing Nagios, http://www.nagios.org on my G3 wifi router.
Basic install was a few simple make cmds and I was happy to get no dependencies pop up - too easy!
The config files are a few and one must dig thru to uncomment a few basics to get anything to work.
I have yet to fully dig thru however setting up some simple host ping checks was straight forward and I look forward to some pretty maps and graphs once I sus out the set up.
PS: The environment seems guest unfriendly yet I hope to allow some access once I RTFM properly ...





Nagios Screen Shot
Click img below to get more recent (larger) map.
I have made a guest account, no passwrd required http://betsuin.apana.wan/nagios/
Enjoy