CommSec's website does have the exact list you are looking for but it isn't in an obvious location.
Here how...
a) Log into your CommSec account at http://www.comsec.com.au per normal
b) Click on the black text on yellow menu button located under the CommSec banner called "News & Research".
c) A new set of black menu buttons will appear just under the existing black on yellow buttons. Hover the pointer over "Market News" and click on "Upcoming Dividends" that appears in the drop down menu.
Bingo! It's all there usually within hours of company announcements.
Note that during the crazy hours of around 1-6 am, CommSec does some updating and often nothing will be shown.
