What are your recommendations for a fast, intuitive, portable third-party solution that uses Dropbox as a data store for my use case? Edit: While separating th

What are your recommendations for a fast, intuitive, portable third-party solution that uses Dropbox as a data store for my use case? Edit: While separating these concerns (storage and presentation) is a solid software engineering approach, without open standards it would seem to just add additional layers of vendor lock-in and brittleness. Syncing to local storage is a non-starter for mobile.