Could an Islamist be Israel's "kingmaker" now?

It's an all-too familiar dance in Israel by now: politicians campaign, activists canvass, and the public laments another draining and inconclusive election. Rinse repeat. Now for the fourth time in just two years, Israelis have voted in general elections. The polls are closed and the votes are being tallied. With 88 percent of votes now counted, what do we know so far and what are the possible outcomes?