Its security track isn't that awesome, though.

And same is lack of differential uploads (change a single byte in a gigabyte blob, get the whole gigabyte re-uploaded).

Thank you! going to see it it has a handly client i can install and it takes care of syncing...

Yep! Mirall is the client (full disclosure, I'm a pseudo-team member working with this client's development) and the server software would also be needed.

Check out http://owncloud.org/ for the full info on getting it set up! :)