We knew about this pre-registration of interest for the Xperia Z1 when one of our forum members, lee480 posted the link in the Xperia Z1 thread. If you are interested, all you need to do is to click on the "Pre-register" link and enter your email address. Sony Singapore will " send you updates and let you know when the Xperia Z1 is available to buy".
If you want to know more about the Xperia Z1, do check out our hands-on article and a first looks at its imaging capabilities. We are currently working on the review of the Xperia Z1, so keep your eyes peeled to HardwareZone!