Take a look at the polling results leading up to the election, and you'll realize why everyone is pissed. He suddenly went from polling around 40% to winning 60% of the vote? Oh, and the Iranian news networks are suppressing coverage of the riots? Oh, and the police didn't let Mousavi (the highest-polling opposition candidate) give a press conference after the results were announced, as had been scheduled? Yeah, that sounds real fucking legit.
The one good thing that might come out of this is that the people might be pissed off enough to oust the current regime and those asstard mullahs. I can only hope that it isn't replaced by something worse, and that my family stays safe through all this.
ETA: Cell phone service has been completely shut off in Tehran, as has access to social networking sites. We think regular phone service might have been shut down as well. No word from family yet.
ETA 2: Power is now out in many parts of Tehran, for "grid repair" (pfft). Some people have been getting word out via illegal satellite hookups, so now the police are starting to crack down on those. There've been continued protests throughout the night. Mousavi has been placed under house arrest, and they might have arrested Khatami too (former president who's part of the same moderate movement). I've also heard that Tabriz (city in northern Iran) is under martial law.