You might consider Dropbox, since the Datastore API seems perfect for the persistence (and live syncing) of data. Try the sample task-list app in a couple tabs: https://dl.dropboxusercontent.com/u/182037406/js-datastore-a...
Thanks for the input, it's much appreciated. This area of improvement for tyto is something that I'm really itching to get working. Will definitely check out the link.
Thanks again for this!