http://www.utas.edu.au/library/companion_to_tasmanian_history

the best historical site I found

http://tysaustralia.com/goldrushtasmania.html 

interesting mining site 

http://www.tas-prospecting.com very interesting - Tasmanian Prospecting Forum 
http://www.maritimetas.org Tasmania's rich maritime past

http://eprints.utas.edu.au 

digital archive from the University of Tasmania

http://www.linc.tas.gov.au

Tasmanian government with a interesting archive