I live in Australia currently actually, and I have the Android L update. You have to download the factory image from here - http://developer.android.com/preview/setup-sdk.html#top
(you have to scroll down and click on hammerhead) - and then flash it on your phone. Be warned this is a developer preview, while I am using it for my daily driver, it may not be for you. Be warned you also have to completely wipe your phone when you flash this, unless you do some modifications to the flash.bat to not wipe your device.
Moto X | Nexus 5 | Nexus 7 | Galaxy Note 10.1 | HTC HD2 | HTC Desire | HTC Desire S | iPod touch 5G