From an AP story, no less:

Between August and October, Iraq lost $7 billion dollars in potential revenues due to sabotage against the country's oil infrastructure, according to Assem Jihad, spokesman of the Oil Ministry.

I think the only people who annoy me more than those who write "$5 dollars" are those who write "5$" because that's how they'd read it out loud. If people can't figure out what "$" means, maybe Shift-4 should go to something more useful, like "Make those damn Dock icons stop bouncing."