Jim Richardson over at Museum Marketing has quite a comprehensive list of museums that are currently using Twitter as a platform to connect with users. The only problem for those of us in the Southern Hemisphere is that it is very US and UK dominate. So below I've made a list of museums or other cultural institutions in Australia that are currently using Twitter. If I missed you, leave a comment with the Twitter URL.

The Australian Museum - http://twitter.com/austmus
Museums & Galleries NSW - http://twitter.com/MGNSW
Museum Victoria - http://twitter.com/museumvictoria
Object Australia - http://twitter.com/objectaustralia
Art Gallery of NSW - http://twitter.com/ArtGalleryofNSW
Museum of Wagga Wagga - http://twitter.com/MuseumWagga
National Museum of Australia - http://twitter.com/Nat_Museum_Aust
National Trust - http://twitter.com/nationaltrustau
National Gallery of Victoria - http://twitter.com/ngv_melbourne
Queensland Art Gallery - http://twitter.com/QAGGoMA
National Film & Sound Archive - http://twitter.com/NFSAgov
Art Gallery of Western Australia - http://twitter.com/ArtGalleryWA
Questacon - http://twitter.com/Questacon
National Library of Australia - http://twitter.com/nlagovau
NSW State Records - http://twitter.com/staterecordsnsw
Tasmanian Museum & Art Gallery - http://twitter.com/tasmuseum
Museum of Contemporary Art - http://twitter.com/mcasydney
National Portrait Gallery - http://twitter.com/NPG_Canberra
Powerhouse Museum - http://twitter.com/the80sareback
Queensland Museum - http://twitter.com/qldmuseum
Australian War Memorial - http://twitter.com/AWMemorial
History South Australia - http://twitter.com/HistorySA
Migration Museum - http://twitter.com/MigrationMuseum
Melbourne Museum - http://twitter.com/melbournemuseum
Parramatta Heritage Centre - http://twitter.com/Parraheritage
South Australia Maritime Museum - http://twitter.com/SAMaritimeMuseu
Collections Australia Network - http://twitter.com/CAN001