did you manage to get any info from anywhere on this please?
also, are there any rooting instructions for the Ouku?
I can help you with the rooting issue.
The Ouku Horizon (I've had one) can be rooted using SuperOneClick, but first you need to install the drivers.
The easiest way to get the drivers installed is to look for Windows app called "Pdanet".
Pdanet is meant to allow usb tethering between any Android phone and a pc, but the best part is that it comes bundled with drivers for anything. When you install Pdanet and are prompted to install drivers for your phone, the app shows you a list of cell phone makers. You just choose "Other", let Pdanet install the drivers, and, since then, you can use SuperOneClick, and it will work and root your phone.