In a post of a month ago (April 3, to be precise), I speculated about whether the prospect of a UN vote on Palestinian membership might lead to a reconciliation between Fatah and Hamas. It appears that such a reconciliation has now occurred, but more as a result of Egypt's having taken a new, more active role as broker or mediator between the two. This is one result of Mubarak's departure. Israel is making all kinds of noises, trying to get Mahmoud Abbas to back out of the Fatah-Hamas deal. He isn't going to, obviously, and anyway it's not at all clear that he should. Instead, perhaps Netanyahu should try silence for a while, rather than bluster. You never know what that might lead to.
Update: The deal has now been signed.