Here is the list of the latest international one-day rankings released on Saturday night (See under headings: World Cup group, position, country, matches played, won, lost, tied, no-result, percentage won:
A 1 Australia 39-28-9-1-1 73.68%
B 2 South Africa 55-35-18-1-1 64.81%
B 3 Sri Lanka 54-33-19-1-1 62.24%
A 4 Pakistan 64-37-26-1-0 57.81%
A 5 India 59-27-31-0-1 46.55%
B 6 New Zealand 47-18-27-0-2 40.00%
B 7 England 29-11-17-0-1 39.29%
A 8 West Indies 52-18-32-0-2 36.00%
A 9 Zimbabwe 59-17-41-0-1 29.31%
B 10 Bangladesh 9-0-9-0-0 0.00%
B 11 Kenya 4-0-4-0-0 0.00%
Yes the matches are the ones played during the last one year. The standings in september this year will be taken as the finals ones to decide the 2003 world cup groupings.
As ehsan says the rankings in september this year will decide the final position so there might be changes in the groups of teams.
Also one more team will be taking part in world cup to make total 12 teams. Adding that to group A form these standings should make it a bit easier.
I do agree however that group B at the moment seems a stroll in the park compared to group A. On the plus side, teams qualifying for 2nd round from group A will get easier teams to play against at that stage.