RSS, bandbreedte, etc

Paolo Valdemarin: " But these are almost exceptions. I could very well poll other feeds maybe not only once per day but less frequently than once per hour. A very simple feature that aggregators could have would be letting users decide how frequently they want to poll every feed they subscribe to. While some feeds might require hourly scanning, other could be scanned every 2, 4, 6, 12 or 24 hours.

Extending this philosophy, a preference could be set also at feed level, indicating how frequently a feed should be polled (why keep polling it if it doesn't update?). "