I was about to say that I ordered the US version off Play-Asia and wondered why you weren't, then I checked to see that they're now sold out. Anyway, the menus are very straight forward (basically just pictures with a star-rating for the difficulty). You would only run into trouble with the tutorial and description of modifiers that you can apply to songs.
Yeah I saw that it was out of stock =/ and the Best Hits version is only ~37 AUD but that's coming out in Sept. Thanks for the info.
How much was the US version? I see someone selling the US version on Ebay for $60 which I might just grab instead.