The UN's Office for the Coordination of Human Affairs in the "occupied Palestinian territories" (OCHA-oPt) has been maintaining a presence in the PA areas and Gaza for many years now. Sometimes it has been a good source for statistics.
But their website, which used to include weekly reports, has not been updated since June, 2010.
The Gaza NGO Safety Office, run by CARE, is meant to help protect other NGOs in Gaza by letting them know what areas are dangerous or might become dangerous.
But they have not issued any of their biweekly reports since December 12, and now the only updates are SMS messages of things happening in real time.
Not sure if this is meaningful, but it is noteworthy.