Hey Ninja I was thinking about that too. This whole thing could have huge implications for the Isreal/Palestine conflicts. If a left-wing for-the-people government gets in they will almost certainly side with the Palestinians. What I fear most is a right-wing washington candidate replacing Mubarak.
However I think the chances of a government hell bent on destroying Israel is pretty unlikely. You make enemies with Israel, your making enemies with the US. And Egypt has long standing good relations with the US.