Interesting, I'll have to look at this in the near future. Definitely like what I see at a glance. One problem I've had with some other client sync/db options is that they don't support the use case for public, shared and private tables/collections. A lot of real world apps may have items that are available to all users (read only or not), some users (by group or management chain) or private (but reassignable by managers) in order to support real world workflows and potentially confrontational work (think avoiding stealing other worker's contacts/commissions).