Hi Billbu,
just realised that those Dividend numbers may be lower as Duet gets further dividends from SOLA's which wouldn't come to AET&D.
Also Blues234 you can get Net Debt numbers from the Duet presentations which show as at Dec 2010 being:-
DBNGPL $2,491m propotional $498m
Multinet $831m $167m
WAGN $625m $464m
Which help to reduce overall debt amount.