Chris O'Neil in 1978.
The Men's Singles C'ship at the Australian Open this year(2009).
Evonne Goolagong-Cawley in 1977 [singles] Alicia Molik 2005 [doubles]
Maria Sharapova won the Australian Open in 2008.
No, Kim Clijsters did not win the Australian Open in 2003. She won the Australian Open in Women's singles in 2011. She did make it to the Quarterfinals in Doubles at the 2003 Australian Open. Serena Williams won the Australian Open in 2003 beating her sister Venus Williams in the final.
Yes, in 2010 Serena won australian open champion 2010 title.