We've been experiencing a lot of latency recently.  We've contacted our ISP (we have a T1 for 40-50 employees), they checked everything on their end out and it seems fine to them.  So I've been using Wireshark to take logs, but I'm hoping there is a way to do some automated reporting.  I want to get some stats on things like how many people are browsing the web most of the time, and during the periods of latency...how much packet loss we are experiencing...and lots more.  In addition to trying to understand and isolate the problems we are having now, i want to use it in part as an educational tool for myself.
This past summer, we replaced our entire network with all Gigabit Switches and NICs and CAT6 wiring, and spent another couple hundred thousand on a new server infrastructure.  We shouldnt be having these issues...