There is an interesting comment  in Gulf News (with a hat tip to Powerswitch) at http://www.gulf-daily-news.com/Story.asp?Article=135438&Sn=BUSI&IssueID=28332
concerning a massive Saudi investment in refining capacity. Now some may see this as an increase in capacity to cope with an increase in production but could I mischeviously suggest that it is to handle the heavy sour oil they are now producing as no one else can? This would perhaps confirm a peak in light sweet "from the horse's mouth"
SA has been increasing their sour refining capacity and want to increase their NG use by making petrochemicals. They also appear to be looking very heavily at the Philippine and China markets.