As hyper-inflation eats away at the Syrian Pound and rebels use US Dollars to buy weapons (presumably), Assad has outlawed the US Dollar inside Syria.
Video from FTM Daily: http://www.youtube.com/watch?v=PqDl74bgGOk
UPDATE: I noticed that the Wall Street Journal has stopped listing the exchange rate of the Syrian Pound in the Commodities & Currencies section of the newspaper. It still has Lebanon, Jordan, Bahrain, Israel, Egypt, etc. I wonder if anyone knows the true value of the currency at this point.