Brian C. Dilley covers pitfalls, & strengths of using MongoDB ("a very approachable NoSQL solution"), and introduces MJORM. The MJORM project is an annotation free MongoDB Java ORM library. This article builds on Brian's real world in the trenches experience with MongoDB and includes "gotchas" like "Don't treat MongoDB like an RDBMS...", how to "design your indexes carefully", and more.
Omnipresent synchronisation will be easy with CouchDB not only hosted as server side database but also being embedded in mobile applications. Couchbase made the NOSQL Document Database available for the mobile platforms to enable developers to benefit from the replication and offline capabilities while using the convenient and uniform HTTP based protocol to interact with it locally or remotely.