While the TSA introduced light regulations for Apple's iPad (you only need to take it out of your carry-on if you're asked to by a TSA employee), Israel has taken a completely different stance. Apparently, they have banned iPads from entering the country and will confiscate yours at the airport if you try to bring it in. So far, 10 iPads have been confiscated. When it's taken from you, your iPad will go to a customs warehouse, where you'll have to pay "rent" for each day it's there. The device will be returned to you upon leaving, or you can make arrangements to ship it out of the country.
Apparently, Israel isn't too sure about the device and wants to wait until the device is deemed appropriate for Israeli standards before approving it for use in their country.