How about tracking the average (or breakdown by user) ping just like the Active Players graph used to do? Is this possible?
Or is it a user-executable command only? Is it different doing the command from within the V-O game client versus doing it via terminal command-line?

Mine's been varying wildly recently. Last week I was bouncing between 40 and 70 ms, Monday and Tuesday night i was around 15-20 ms. Wonder what's up.

Would this be a valuable tool for the devs?

/togglenetgraph

Not quite the same, but might be useful to individual users.

/togglenetgraph is kind of useless to have allways on, way to annoying to have all those lines over your whole screen...
Just a little graph in the bottom right of your screen would be much better.

Like this graph on the right side?

http://themuffin.net/etpro/lagometer-antiwarp.jpg

Yeah like that kihjin, but I'd settle for something like what FiReMaGe made with the active users graph.
I just dunno if the server can keep track of ping rates for clients. Probably not.
I'll start keeping track myself, using the high-tech pencil and paper method!