You can give it a try using our Bitnami packages for OwnCloud. Free, ready-to-run native installers, virtual machines and cloud images (AWS/Azure) http://bitnami.com/stack/owncloud
Interesting link! Do you plan to offer a LAMP stack for ARM-based devices? I am running my home-server on a BeagleBone Black because electricity is expensive (2 € per Wattyear) and the BeagleBone only needs around 1 Watt of power (in addition to being dirt cheap).
By chance, setting up OwnCloud was my project for this afternoon and it is humming along nicely, but I always feel uneasy about exposing something to the interwebs that is only set up "sort-of" securely by some layman (me).
We have been discussing the idea on and off. We even had a proof of concept for one of the earlier ARM-based devices (SheevaPlug) but we have decided to concentrate on the most popular applications/platforms first (for example, we also supported Solaris at one point but stopped). We are a very small team so it is a matter of where to focus :-/