www.steamboats.com/research/australia.html
This is on my list of favourites, but I don't get there very often.
It seems to be fairly old (html 4.01) and not updated (Lady Stelfox in Tasmania).
The original list was supplied to the site by Leith Hall, who is now a freqent Paddleducks contributor.

Regards,
Roderick B Smith
Rail News Victoria Editor