I also discovered a fascinating resource provided by the Art Gallery of NSW which allows you to search their gallery on-line and create your own annotated gallery of favourite paintings. If you want to try this go to www.artgallery.nsw.gov.au/mvg
Over and out!
PS: for Twentieth Century Students it is worth noting that the Australian section in the NSW Gallery has also set up a special exhibtion of Australian paintings and sculptures that have been directly inspired by the work of T.S. Eliot, especially his "The Waste Land" and "Four Quartets".