More on the political manoeuvrings

So I was listening to BBC World Service today, and there was a discussion on there with one of the founders of the revolutionary Guards who now lives in exile in the States. Can't remember the name, but would like to know for background.
Anyway, he said Mojtaba Khamenei, the Supreme Leader's son wants the job. Over at Huff Post, there's a translation of this letter where the first time I've heard, it's said that Khamenei senior has cancer, and that's why this power struggle is happening now.
So the struggle is about the role of Supreme leader, and how that sits with the republican system and how that role has an imperial quality to it (remember, Iran has a long Imperial history - much longer than it's been islamic!).
The translation on Huffington post also says Rafsanjani wants the Supreme Leader role, but I don't think that's right, I understood it was Montazeri who was after that role.
The letter apparently also says that almost half of the Council of Experts have called for annulment of the elections.

I guess they're figuring a way to save their skins. If this carries on, they have less and less respect from the population.

The people demonstrating need to be cautious in their expectations: clerics and politicians are generally more concerned with their own welfare than the peoples'.