rocky horror :-) they play it at midnight once a month in sydney, and everyone dresses up and sings along... many with *hemhem* alternative lyrices.
shrek
fight club
the lives of others (that last line, where he says "it's for me" and it really is)
beautiful people
billy elliot
palindromes (horrifying, but incredibly well done)
ten canoes (an aussie one)
borat
monty python
erin brokovich
alices restaurant
the english patient
i also saw a fantastic interesting film called "miss navaho" about a beauty pagent where the contestents like, butcher sheep n stuff. It was a real eye opener.
And drop dead freds a great movie :-)
