FYI, here's what Israel is trying to keep out of the Gaza strip:
sage, cardamom, cumin, coriander, ginger, jam, halva, vinegar, nutmeg, chocolate, fruit preserves, seeds and nuts, biscuits and sweets, potato chips, gas for soft drinks, dried fruit, fresh meat, plaster, tar, wood for construction, cement, iron, glucose, industrial salt, plastic/glass/metal containers, industrial margarine, tarpaulin, sheets for huts, fabric (for clothing), flavor and smell enhancers, fishing rods, various fishing nets, buoys, ropes for fishing, nylon nets for greenhouses, hatcheries and spare parts for hatcheries, spare parts for tractors, dairies for cowsheds, irrigation pipe systems, ropes to tie greenhouses planters for saplings, heaters for chicken farms, musical instruments, size A4 paper, writing implements, notebooks, newspapers, toys, razors, sewing machines and spare parts, heaters, horses, donkeys, goats, cattle, and chicks
I found the list in an informative article entitled "Why did Israel Attack the Gaza Flotilla" here, with a quick reminder of various reports on the effects of the blockade on the people of Gaza. The list was compiled by Gisha, an Israeli not-for-profit which defends Palestinian rights and has raised legal challenges to the blockade.
UPDATE:
Spurred by what fellow Kossack angel d characterized as a "thread-jacking" to shift discussion to the source of this list, I dutifully did my homework and found some very interesting stuff at the Gisha website, to wit that Gisha has repeatedly had to sue the Israeli government for information on the blockade.
Only on May 6 of this year did the government even admit in court that they maintain lists of goods permitted to enter Gaza, as well as a document laying out what they think the minimum nutritional requirements for Gaza residents are! Their repeated previous denials that these documents existed were because they "misunderstood" the request!
The government promptly filed a motion that the documents be kept secret from the Israeli public lest they "harm national security and foreign relations."
(There is also a link on the page to a pdf with lists of permitted and banned items and a paragraph on the methods they were forced to use in order to compile them.)