steve waugh has played most matches in world as captain
27 matches were played in the 1983 Cricket World Cup.
37 matches were played in the 1996 Cricket World Cup.
42 matches were played in the 1999 Cricket World Cup.
27 matches were played in the 1987 Cricket World Cup.
49 matches will be played in the 2011 Cricket World Cup.
Australia played 719 matches till Feb, 2010 and has won 337 of them; 2 tied; and lost 186 - rest were drawn
12 matches were played in Sri lanka
9 matches
Sachin Tendulkar(462 matches)
Total 54 matches played between 14 teams in 2003 cricket world cup
49 matches.
Current Test and ODI and T20 captain is Steve Smith for Australia Cricket Team. Though there is no t20 matches has been played by Stiv smith's captaincy yet!