Network Bandwidth Utilization for the various OpsMgr 2007 Roles
The opsmgr product team just wrote a very nice post about network bandwidth utilization specified per opsmgr 2007 role.
They have also post a script that helps you count the number of events generated per sec on the local computer.
just supply the computer name as an argument.
This can be useful in situation where it is not possible to install a pilot ACS collector in order to measure incoming event rate (by looking at the perf counter ACS Collector\Incoming Event per Sec).
One thing the product team assure is that the performance of the ops console will be much faster in sp1 !! That's good news!!
On the blog of Jef Skelton you can find a graphic illustrating the bandwith usage difference between the mom and opsmgr.