[dervish]

No that is not what they are chanting. (see Michael Totten http://www.michaeltotten.com/archives/2009/06/iran-on-fire.php )

They are shouting “Allahu Akbar,” God is great. You may have heard that phrase before in other contexts - jihadists like it alot.

[Protect the Bill of Rights]

from your link:

Mahmoud Ahmadinejad sounds like Baghdad Bob right about now: "It was a free and healthy election," he said.

LMAO!! Priceless!

[Califreak]

The quote I posted was from the same source you posted.

And yes, I know how they use the other expression.

[Freedom Dignity n Honor]

It is kind of a code. It's planned for them to go to their roofs and yell Allaho Akbar. This way they aren't in trouble for yelling things too bad and they can get an idea of how many are with them. It's my understanding they want to do this before they decide on how far to go. They want to make sure there are enough of them.