This is partially a response to Stephen's post, but I wanted to post this video and sort of expand the discussion to the question of border restrictions as a way to control aid and exert political influence.
This is a video from Al-Jazeera English describing the black market in Gaza where humanitarian aid is sold for other necessities, such as schoolbooks. This report is from about a month ago, so the situation may be changing as we speak. I did find a more recent
AP article, and as Stephen and Laura mentioned it appears that the longer-term issues facing recovery in Gaza will not be a question of humanitarian aid (the article reports $4-5 billion in pledged international aid) but one of restrictive borders that are preventing infrastructure-based aid from coming to Gaza.

This
Reuters article reiterates the issue of border crossing impeding the flow of humanitarian aid into Gaza. According to these two articles, both Israel and Egypt are putting heavy restrictions on what can pass through. Israel cites the need to screen reconstruction projects (and thus the materials entering the Gaza strip) on an individual basis so as to prevent these projects from benefitting Hamas. Egypt, on the other hand, is using border restrictions to pressure Hamas into making amends with Mahmoud Abbas.
I think border screening/security can become a tough issue during and after violent conflicts. Border restrictions can slow down the flow of humanitarian aid into high-need areas, and the individual screening process for reconstruction projects may bog down efforts to rebuild essential infrastructure like housing, medical facilities, schools, etc. Is Israel justified in taking these kinds of measures if it prevents aid from reaching Hamas? Is Egypt justified in using restrictions to pressure some sort of reconciliation between Hamas and the West Bank P.A.?