I work for a LAN/WAN Service Provider. At the moment we are searching for a tool that will monitor our VPN connections (about 70) We do need features like the alert system, the route change list and the trace list. The only reason we can't use your tool at the moment is, that we need to trace all Locations at the same time.
So my suggestion for a futur version of pingplotter would be the possibility to trace different Locations at the same time. So that our support team could check the listings when a connectionproblem occurs.