I wasn't around here at the time before the RWC even started, but these were my original predictions:
Pool A
South Africa
England
Tonga
United States
Samoa
Pool B
Australia
Fiji
Wales
Japan
Canada
Pool C
New Zealand
Italy
Scotland
Romania
Portugal
Pool D
France
Argentina
Ireland
Georgia
Namibia
I did fairly well in group stage predictions, here is what I originally predicted afterward.
Quarter finals
England over Australia
New Zealand over Argentina
South Africa over Fiji
France over Italy
Semi finals
New Zealand over England
France over South Africa
Third Place
South Africa over England
Finals
France over New Zealand
Well, instead of France beating the All Blacks in the finals it happened in the quarters. Either way I made the right call from the beginning, so I'm happy. I think too many people figured England would be lucky to make it to the Semis. In my opinion that's a bit harsh considering that they are defending champions. I figured they at least make it into the semis and challenge New Zealand and South Africa.