Yes, points will carry forward, BUT only for the group match between the top two teams of the group. Points earned from group matches against the teams which did not qualify for the Super-8 will not carry forward.
Here are the excerpts from the ICC World Cup Playing Condition:
“Following the Group stage the top 2 teams in each group will progress to the next phase (the Super Eight series). Each team will play every other team that has qualified for the Super Eight series except for the team that it played in the Group stage (six matches). The result of this match and any points gained will be carried forward to the Super Eight series. No other points from the Group stage will be carried forward to the Super Eight series."
Source:
ICC World Cup 2007 Playing Condition