If you want an off-beat Aussie romantic comedy with various allusions to The Wizard of Oz, may I recommend Danny Deckchair (2003, PG-13). It's based on a true story, but the location has been moved to Australia. I'm not going to give you a long review, just note that if you want a few laughs and see this movie at the local store, rent it.
Ignore Ebert's ranting about plot inconsistencies. You'll know they exist, and you won't care.