A raw list of the latest 100 ASX company announcements via RSS is available from
http://finance.mooh.org/rss.php.
The feed updates every 5 minutes during market hours.
Additionally you may customise the list of companies for which announcements are syndicated by adding an 's=' parameter referring to a comma separated list of tickers.
For example, if you are interested in Telstra (TLS), Qantas (QAN), and Woolworths (WOW), you would use the following URL:
http://finance.mooh.org/rss.php?s=TLS,QAN,WOW
If you don't know the relevant tickers the ASX provides a
code lookup page.
Feedback more than welcome:
webmoostah@mooh.org.