The US gets something like 1% of its oil from Libya, the EU however does get oil from Libya but most goes to Asia. Syria is a relatively small player producing about 0.4mbd and is sanctioned by the US and EU - they are not importing it. The US is not importing Iranian oil either, however the EU takes about 0.5mbd which is why they are shooting themselves in the foot by going along with the US and sanctioning Iran as they need to find that supply elsewhere - which will be at a higher cost (assuming Saudi Arabia can even make up for the shortfall as they claim).
The US imports about 15% of its oil from the persian gulf and the big issue for them is if Iran cuts the strait of Hormuz it blocks most of the oil out of Iraq and Kuwait, Qatar, the UAE and Saudi Aradia. The EU has a greater reliance on persian oil and so by going along with the US war mongering they are making it even more difficult for themselves to come out of recession as oil prices increase under the treat of war.
That article is just more lip service from Iran - there is nothing new in it and I don't think them talking about being open to accepting gold as payment escalates the situation further. From my understanding it is not so much the fact that Iran is moving away from the USD but the threat of cutting supply through action in the straight that is the looming black swan. Granted there is a movement away from the USD to be used as a trade and reserve currency which whilst it might be negative to USD demand is probably a not a bad thing overall as the world slowly becomes less affected by their flawed fiscal policy.