The link timed out for me.  Can you give us the gist?
It is primarily the US which stands to lose out from any move away from the petrodollar status quo, it is the world's largest importer of oil and a move away from invoicing oil in dollars to euros will undoubtedly have a negative effect on its economy.
Fewer nations would be willing to hold the dollar in reserve which would cause a significant devaluation and result in the loss seigniorage revenues. In addition, US energy-related companies stand to lose out as they will be unable to participate in the bourse due to the longstanding American trade embargo on Iran.