The Dictionary of Sydney is one such project.
A search for Simeon Lord produced 36 results where his name was mentioned in records.
You can subscribe to their newsletter to keep up to date with new records added to the site. A recent newsletter provided a link to an article on the history of Botany where Simeon had his woollen mills.
e-Melbourne is the online version of the Encyclopedia of Melbourne published in 2005 - http://www.emelbourne.net.au
Another useful online resource for information about locations in Queensland is Queensland Places - http://queenslandplaces.com.auhttp://www.qhatlas.com.au/