Here's the thing, I would only give arkOS a good look if it were available for other architectures/devices (mainly AWS or other VPS). While I have a few rPi's around for hacking I refuse to host something like email, owncloud or calendar on a device that's relying on a residential connection. Most email blacklists include IP ranges for large ISPs and I simply don't have the requisite upstream at home to host something like owncloud effectively.

That said, I'm happy to donate towards the project because it is cool

I use bittorrent sync on a (really cheap) OVH dedicated server to much success and if I could replace it with something pretty like your product then I almost certainly would.

That is the prime use case for arkOS :) With everyone's support easy and secure self-hosted file sync will be possible for arkOS.