For UK Fans:
Digital Spy Tube Talk
http://www.digitalspy.co.uk/article/ds37848.html
Mark: "Hi, Do you think the fact that the oc is starting in november instead of the start of the american season will help it avoid cancellation and do you know when the 4th season will be on e4? Also in the event of it being cancelled in the US will the remaining episodes be shown in the uk?"
Neil: Moving to a better slot will help it avoid cancellation - it's against both CSI and Grey's Anatomy. January is normally the expected landing time on E4 but it may be a month or two later this time. If it does get chopped prematurely - I suspect given its calibre they wouldn't just take it off the air, but instead maybe reduce the order - but if it is, then E4 would show any produced episodes not yet screened.