I discovered through my control panel for wolispace.com that I can see the server load and memory usage - but I dont know what else is hosted on the same server.
When not logged into cow I get values like 0.77 and 0.89 - but once I got 2.24 (who know what caused that).
Then when I login a couple of players it seems to over around 1.42 - sometimes up to 2.04 and others down to 0.87
Now I have no idea what these numbers mean but I get a green dot when it is below 1.0 and a red dot when above.
Memory useage is a stable 38% wether logged in to cow or not.
I think the only way we can get some real stats on this kind of stuff is to try it on a proper server which lets us putty in and go top.
I will see if I can get it on our dev box at work :-)