Preparing for Civil War?

We all know Badr and other militant organizations funded via SCIRI are receiving lots of dough from Tehran. But here's a question.

Who's funding the Sunni militias? (besides obvious Sunni neighbors)

I realize they don't need tons of money with so many target rich neighborhoods and all... But haven't we all learned by now that civil wars take funding? And if so, whose funding the out party in this civil war?

And to whose gain?

I've heard a rumor repeated several times now that its coming from some very likely sources.