Two news articles comment that (1)speculation , (2)the depreciating dollar ,(3)the supply/demand 'mismatch' and (4) political insecurity ... may well help oil to $100/barrel in near future.

http://news.yahoo.com/s/ft/20071019/...20070302459290 {FT}
Excerpt:
"Until there is a clear prospect of the [supply-demand] gap being filled, then the course is set for the market to take out $90, $100 and $110 in fairly quick succession," Mr Norrish said.

http://www.msnbc.msn.com/id/12400801/ {AP}
Excerpt:
"We don't think industry fundamentals support oil prices near $60 (a barrel), let alone $90, but with excessive speculation and lack of government scrutiny, prices could go even higher, before they crash, eventually, in our view," said Fadel Gheit, an analyst at Oppenheimer & Co., in a research note.