Actually it's surprisingly underwhelming. Anonymous hit some small personal sites (a psychologist, some non-profits, a real estate agency, alternative medicine college) - most of which were back online within 30 mins.

The only government sites they've defaced were Israel's international aid agency (http://mashav.mfa.gov.il/) and some committee about restoring quarries or something. Compared to their incessant boasting that's pretty pathetic.