It would be incredibly useful to be able to view the polling capacity over time the same way bandwidth, storage, or memory is tracked. Nobody wants to be surprised by approaching the threshold on their polling engine
Does this report help?
Note that you have to monitor the poller in order for it to show up in the report, but otherwise, CPU, RAM, etc is in there.
...aaaaaaand forgot the link...
http://thwack.solarwinds.com/docs/DOC-168997